Anritsu

Anritsu Corporation is a Japanese telecommunications test and measurement equipment manufacturer founded in 1895, headquartered in Atsugi, Kanagawa. Anritsu provides test equipment for quantum communication systems including optical network analyzers, signal analyzers, and specialized measurement instruments for quantum key distribution (QKD) networks and quantum communication infrastructure validation. The company develops testing solutions for quantum-safe telecommunications and post-quantum cryptography implementations. Anritsu serves telecommunications operators, quantum technology companies, research institutions, and quantum network developers requiring precision test equipment for quantum communication systems. The company contributes to quantum communications infrastructure development providing essential test and measurement capabilities for quantum networking deployments and quantum-safe telecommunications validation advancing quantum technology commercialization in telecommunications sector.

Anritsu Corporation

Anritsu is a Japanese test and measurement company providing microwave and RF equipment for quantum computing control systems. The company manufactures signal generators, spectrum analyzers, and network analyzers used in quantum research and development. Anritsu’s precision RF and microwave instrumentation serves quantum computing companies and research laboratories requiring high-performance test equipment for characterizing and controlling quantum processors at microwave frequencies.

Company Information

• Founded: 1895
• Country: Japan
• Website: https://www.anritsu.com
• Categories: control electronics, quantum components

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blueqat Inc.

blueqat is a Japanese quantum computing startup partnering with the Institute for Molecular Science to develop Japan’s first cold neutral atom quantum computers with commercialization targeted by 2024. The company combines quantum hardware development with open-source quantum software tools to advance quantum computing accessibility in Japan. blueqat is part of Japan’s national strategy to achieve quantum computing independence through domestic cold atom technology.

Company Information

• Founded: 2018
• Country: Japan
• Website: https://blueqat.com
• Categories: quantum processors, quantum software

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Development Bank of Japan Quantum Investment

Development Bank of Japan (DBJ) is a national financial institution partnering on quantum computing commercialization initiatives including cold atom quantum computer development. DBJ provides strategic financing and investment for Japan’s quantum technology ecosystem as part of the government’s industrial policy. The bank’s involvement demonstrates Japan’s commitment to mobilizing both public and private capital to build a competitive quantum computing industry and achieve technological sovereignty in this critical sector.

Faraday Factory Japan

Faraday Factory Japan is a Japanese manufacturer developing cost-effective mass production methods for High Temperature Superconducting (HTS) tapes with production capacities approaching 100 thousand kilometers per year. The company produces second-generation HTS wire using advanced manufacturing processes, reducing costs and increasing availability of superconducting materials for quantum computing applications. Faraday Factory Japan manufactures superconducting tape essential for quantum computing infrastructure including superconducting qubits, quantum interconnects, and cryogenic quantum systems. The company’s mass production capabilities enable large-scale deployment of superconducting materials for quantum processors and quantum technology applications. Faraday Factory Japan serves quantum computing manufacturers, research institutions, cryogenic equipment providers, and quantum technology companies requiring high-volume, cost-effective superconducting wire for quantum computing infrastructure, quantum communication systems, and quantum sensing applications.

Fixstars Amplify

Fixstars Amplify is a Tokyo-based company established in 2021 offering a cloud platform tailored for combinatorial optimization problems integrating quantum annealing, Ising machines, and gate-model quantum computers. The platform includes an SDK and execution environment for Ising machines, automating logical model conversion, physical model conversion, and machine execution to make quantum annealing programming more accessible. Fixstars Amplify is compatible with its own Fixstars Amplify Annealing Engine (AE) and all available quantum annealing/Ising solvers, mathematical optimization solvers, and gate-based quantum computers. The GPU-based Amplify AE processes large-scale problems consisting of more than 100,000 bits at high speed. Since public availability in 2021, Amplify has processed more than 45 million user requests as of October 2024. Fixstars Amplify has been adopted in the Mitou Target Program since 2021, receiving positive feedback for SDK ease of use and performance. The platform offers Toshiba’s Quantum-Inspired Optimization Solution SQBM+™.

Fixstars Amplify AE

Fixstars Amplify is a cloud-based quantum computing platform that includes SDK and execution environment for Ising machines. Part of Fixstars Corporation, Amplify platform founded in 2021. In November 2024, collaboration between RIKEN, NTT, and Fixstars Amplify launched world’s first general-purpose optical quantum computer accessible through cloud system, advancing large-scale quantum calculations. The optical quantum computer operates at nearly room temperature with high-speed processing up to several hundred terahertz, using optical multiplexing for compact large-scale calculations with high compatibility for networked quantum systems. Fixstars Amplify compatible with not only Fixstars Amplify AE annealing machine, but also all available quantum annealing/Ising solvers, mathematical optimization solvers, and gate-based quantum computers. Platform used by over 400 companies and schools domestically and internationally for combinatorial optimization applications. Offers Toshiba’s Quantum-Inspired Optimization Solution SQBM+.

Fuji Electric

Fuji Electric Co. Ltd. is a major Japanese electrical equipment manufacturer founded in 1923, producing superconducting materials and components serving quantum computing and power applications. The company manufactures superconducting wires, cables, and systems using both Low Temperature Superconductor (LTS) and High Temperature Superconductor (HTS) technologies. Fuji Electric provides superconducting solutions for quantum computing infrastructure including cryogenic systems, superconducting magnets, and power conditioning equipment essential for quantum processors. The company leverages extensive experience in power electronics and cryogenic systems to support quantum computing manufacturers requiring reliable superconducting components. Fuji Electric serves quantum technology companies, research institutions, and cryogenic equipment manufacturers in Japan and globally, providing superconducting materials for quantum processors, quantum communication systems, and quantum computing infrastructure requiring advanced superconducting technologies.

Fujikura

Fujikura Ltd. is a major Japanese manufacturer founded in 1885, producing superconducting wires, cables, and materials for quantum computing and telecommunications applications. The company manufactures High Temperature Superconducting (HTS) wire and cable products using advanced production technologies, serving quantum computing infrastructure requirements. Fujikura provides superconducting solutions for quantum processors, superconducting qubits, quantum interconnects, and cryogenic quantum systems requiring ultra-low resistance electrical conductivity at cryogenic temperatures. The company leverages over 135 years of cable and wire manufacturing expertise to produce high-quality superconducting materials for quantum technology applications. Fujikura serves quantum computing manufacturers, research institutions, telecommunications companies, and cryogenic equipment providers requiring reliable superconducting wire and cable products for quantum computing infrastructure, quantum communication networks, and quantum sensing systems.

Fujikura Quantum Division

Fujikura Ltd. is a Japanese electrical equipment and cable manufacturing company founded in 1885 and headquartered in Tokyo, Japan, with Quantum Division developing optical components and fiber infrastructure for quantum communications networks. Fujikura manufactures specialized optical fibers, photonic components, and fiber optic cables supporting quantum key distribution (QKD) systems and quantum networking deployments. The company develops low-loss optical fibers optimized for quantum communications, single-photon compatible fiber components, and quantum networking hardware. Fujikura collaborates with Japanese telecommunications operators and quantum technology companies deploying quantum-safe communications infrastructure. The company participates in Japan’s national quantum secure networking initiatives providing essential optical infrastructure for quantum communications. Fujikura serves telecommunications operators, quantum technology companies, government agencies, and research institutions requiring specialized optical components and fiber infrastructure for quantum communications networks, QKD systems, and quantum internet development. The company brings over 135 years of optical fiber expertise to quantum communications infrastructure supporting Japan’s quantum technology leadership.

Fujitsu

Fujitsu develops quantum-inspired computing services through their Digital Annealer technology and quantum research programs, providing optimization solutions that leverage quantum-inspired algorithms to solve complex combinatorial optimization problems for enterprise customers, while conducting fundamental quantum computing research and developing quantum technologies including quantum simulators and quantum software tools to advance Japan’s quantum computing ecosystem and integrate quantum capabilities into Fujitsu’s enterprise services portfolio.

Company Information

• Founded: 2018
• Country: Japan
• Website: https://fujitsu.com
• Categories: services

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Groovenauts

Groovenauts is a Fukuoka-based company and one of Japan’s preeminent quantum pioneers, founded in 2012 by Eihiro Saishu and Kumiko Sasaki. The company developed MAGELLAN BLOCKS in 2016, a cloud service that enables companies across industries to use AI to solve hard business problems. In 2019, Groovenauts released the world’s first business optimization service using the D-Wave 2000Q quantum computer via the cloud, allowing customers to solve problems in scheduling, route planning, and more. More than 3,800 companies use over 12,500 AI models through Groovenauts. Notable projects include optimizing retail shifts in 130 stores across Japan and waste collection route optimization in Tokyo’s Marunouchi area with Mitsubishi Estate. MAGELLAN BLOCKS enables anyone, regardless of technical background, to harness the power of quantum computers.

Groovenauts, Inc.

Groovenauts is a Japanese cloud and AI company partnering with the Institute for Molecular Science on cold atom quantum computer commercialization platform development. The company focuses on building cloud infrastructure and software platforms to make quantum computing accessible to enterprises and researchers. Groovenauts brings extensive cloud computing expertise to Japan’s quantum computing ecosystem, bridging the gap between quantum hardware and practical commercial applications.

Company Information

• Founded: 2013
• Country: Japan
• Website: https://www.groovenauts.jp
• Categories: quantum software, quantum cloud

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Hamamatsu Photonics

Hamamatsu Photonics manufactures photonic devices and optical sensors for quantum technologies, including photomultiplier tubes (PMTs), single-photon avalanche diodes (SPADs), and qCMOS cameras for trapped ion and neutral atom quantum computing. Recent products include the ORCA-Quest 2 qCMOS camera with faster readout and enhanced UV sensitivity, plus their first commercial optically pumped magnetometer (OPM) for ultra-low magnetic field detection in quantum sensing. Hamamatsu acquired NKT Photonics in 2022 to strengthen its quantum photonics capabilities.

Hamamatsu Photonics K.K.

Hamamatsu Photonics is a major Japanese photonics company partnering on Japan’s cold atom quantum computing initiative, providing optical components and detection systems for quantum applications. With decades of experience in photomultiplier tubes, photodiodes, and imaging sensors, Hamamatsu supplies critical photonic components for quantum computing, quantum sensing, and quantum communication systems. The company’s quantum division supports the broader Japanese quantum technology ecosystem with world-class optical detection and measurement capabilities.

Hamamatsu Quantum Division

Hamamatsu provides photonics devices from silicon photodiodes to multi-pixel photon counters for quantum information, laser cooling, trapped ions, and NV cameras. The major photonics company manufactures quantum detectors. Hamamatsu’s single-photon detectors, photomultiplier tubes, and imaging sensors serve quantum research and quantum technology applications requiring ultra-sensitive photon detection and counting capabilities.

Company Information

• Founded: 1953
• Country: Japan
• Website: https://hamamatsu.com
• Categories: quantum components, detectors

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Hitachi

Hitachi Ltd. is a major Japanese multinational conglomerate founded in 1910, headquartered in Tokyo, developing quantum computing technologies including CMOS annealing and gate-type quantum computers. Hitachi started R&D on CMOS annealing machine in 2013, combining quantum annealing principles with CMOS technology creating quantum-inspired computers for combinatorial optimization problems. In 2020, Hitachi started R&D on silicon quantum computer as part of Japan’s Moonshot Research and Development Program launched by Cabinet Office. In 2018, Hitachi partnered with University of Tokyo to develop high-speed quantum computer, and signed memorandum with Riken research institute and Belgian research organization to develop silicon-based quantum computer. In June 2024, Hitachi developed new qubit control method stabilizing and extending lifetimes by hundred-fold, accelerating quantum computer development. Hitachi offers CMOS Annealing Cloud Service for quasi-quantum computing serving enterprises requiring optimization solutions across logistics, finance, and industrial applications in Japan and globally.

IMS Quantum Startup

IMS Quantum Startup is a planned startup to be launched by Japan’s Institute for Molecular Science (IMS) to commercialize cold neutral atom quantum computers. The initiative partners with 10 major industry partners including Fujitsu, Hitachi, and NEC as part of Japan’s national quantum computing strategy. This public-private collaboration represents Japan’s commitment to developing sovereign quantum computing capabilities using cold atom technology developed at IMS research laboratories.

Company Information

• Founded: 2024
• Country: Japan
• Website: https://www.ims.ac.jp
• Categories: quantum processors

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Jij Inc.

Jij Inc. is a Japanese quantum computing company focused on quantum annealing, developing the open-source software OpenJij for solving Ising Model and QUBO (Quadratic Unconstrained Binary Optimization) problems. The company provides quantum annealing algorithms and software tools to help enterprises leverage quantum optimization for logistics, scheduling, and combinatorial optimization challenges. Jij bridges academic quantum annealing research with practical industrial applications in the Japanese market.

Company Information

• Founded: 2018
• Country: Japan
• Website: https://www.j-ij.com
• Categories: quantum software, quantum annealing

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KDDI

KDDI Corporation is a Japanese telecommunications operator founded in 1984, headquartered in Tokyo, Japan. KDDI conducts quantum networking research deploying quantum key distribution (QKD) networks and quantum-safe telecommunications infrastructure in Japan. The company collaborates with quantum technology providers advancing practical quantum communications deployments including quantum encryption for secure communications. KDDI explores quantum networking technologies for ultra-secure telecommunications and quantum internet infrastructure development. The company serves Japanese telecommunications markets, enterprise customers, and government agencies requiring quantum-safe communications and quantum network infrastructure. KDDI contributes to Japan National Quantum Technology Innovation Strategy advancing quantum communications and quantum networking for telecommunications industry positioning Japan as quantum technology leader in Asia-Pacific region protecting telecommunications infrastructure against quantum computing threats.

Keio University Quantum Innovation Center

Keio University Quantum Innovation Center is IBM’s first quantum innovation center in Asia, established in December 2023 to provide quantum computing resources and research collaboration opportunities. The center provides Japanese researchers and students with access to IBM quantum systems while fostering quantum education and workforce development. This partnership represents Japan’s strategy to accelerate quantum computing adoption and build domestic quantum expertise through collaboration with leading international quantum technology providers.

Kyoto University

Kyoto University is a national research university founded in 1897, located in Kyoto, Japan, second oldest university in Japan. The university conducts advanced quantum research through physics department and research institutes advancing quantum physics quantum materials and quantum information science. Kyoto University researchers contribute to theoretical and experimental quantum physics quantum computing and quantum technology development. The university maintains strong quantum research programs producing Nobel Prize winners in physics. Kyoto University collaborates with Japanese quantum companies and international research institutions advancing quantum science. The university serves quantum research community through fundamental quantum research quantum education and scientific discovery advancing quantum physics understanding and quantum technology foundations supporting Japan quantum research excellence and scientific leadership.

Mitsubishi

Mitsubishi Electric conducts quantum computing research through their advanced technology research and development divisions, focusing on quantum applications for industrial automation, power systems optimization, semiconductor manufacturing, and telecommunications infrastructure, investigating quantum algorithms for complex optimization problems in manufacturing, logistics, and energy management while developing quantum-safe security solutions for industrial control systems, contributing to Japan’s quantum computing initiatives and exploring quantum technologies that could enhance Mitsubishi’s diverse industrial and technology portfolio spanning automotive, aerospace, energy systems, and electronic components.

Mitsubishi Electric

Mitsubishi Electric Corporation is a major Japanese multinational electronics and electrical equipment manufacturing company founded in 1921, participating in Japan’s Quantum Leap Flagship Program (Q-LEAP) research initiatives. Mitsubishi Electric invested through ME Innovation Fund in quantum startups advancing quantum technology commercialization. The company collaborates with QunaSys developing new approaches in quantum chemistry calculation for materials science and drug discovery applications. Mitsubishi Electric applies quantum computing to optimization problems in manufacturing, logistics, materials science, and industrial automation. The corporation invests in quantum computing research supporting Japan’s National Quantum Mission and quantum technology ecosystem development. Mitsubishi Electric serves industrial manufacturing, automotive, aerospace, and electronics sectors requiring quantum-enhanced computational capabilities for complex optimization, simulation, and materials design applications. The company collaborates with Japanese quantum startups, universities, and research institutions advancing practical quantum computing applications for industrial markets.

Mitsubishi Electric Quantum Division

Mitsubishi Electric Corporation is a Japanese multinational electronics and electrical equipment manufacturing company founded in 1921 and headquartered in Tokyo, Japan, with Quantum Division developing quantum communications and post-quantum cryptography solutions. Mitsubishi Electric joined forces with six partners including Toshiba and NTT to build a national quantum secure networking testbed in Japan. The company has been preparing for post-quantum cryptography, ensuring its information security products use quantum-resistant algorithms. Mitsubishi Electric develops quantum key distribution systems, quantum-safe networking equipment, and post-quantum cryptography implementations for telecommunications and critical infrastructure protection. The company invests in quantum technology research supporting Japan’s quantum communications infrastructure development. Mitsubishi Electric serves Japanese government agencies, telecommunications operators, financial institutions, defense contractors, and critical infrastructure sectors requiring quantum-safe communications equipment, QKD systems, and post-quantum cryptography implementations. The company contributes to Japan’s quantum technology ecosystem advancing practical quantum security solutions for telecommunications and enterprise markets.

Nanofiber Quantum Technologies

Nanofiber Quantum Technologies (NanoQT) is Japan’s first startup focused on quantum computer hardware development, employing a unique nanofiber-based Cavity QED (Quantum Electrodynamics) method to construct universal quantum computers. Leveraging over a decade of engineering innovation, NanoQT developed a proprietary nanofiber cavity that unlocks the advantage of cavity QED while maintaining compatibility with optical fiber and existing quantum processing unit architectures. The company’s interconnect technology is highly engineered for neutral-atom QPUs, providing a path beyond per-unit scalability limits. NanoQT announced the first closing of its $14 million Series A financing led by Phoenix Venture Partners, following more than $20 million in government R&D grants across Japan and the United States.

NanoQT

Nanofiber Quantum Technologies (NanoQT) is a Tokyo-based quantum technology company founded in 2022 that develops cavity-QED based, fiber-native quantum interconnects for networked quantum computing. The company secured $14 million in Series A funding in October 2025 led by Phoenix Venture Partners to build quantum interconnect infrastructure enabling scalable, modular quantum computing systems. NanoQT specializes in ultra-low-loss nanofiber cavity technology engineered for quantum processors, enabling strong atom-photon coupling and paving the way for scalable quantum interconnects that link quantum processing units via photons. With offices in Tokyo, Palo Alto, and College Park, the company focuses on developing quantum networking hardware essential for distributed quantum computing and quantum communication systems, contributing to Japan’s quantum technology ecosystem and advancing fiber-native quantum interconnect solutions for next-generation quantum computing architectures.

NEC

NEC is a Japanese technology company that develops quantum annealing and gate-based quantum computing systems, creating quantum computers for optimization problems and quantum simulations while offering quantum cloud services and quantum software development tools, implementing ParityQC’s architecture in their first quantum processor and focusing on practical quantum applications in logistics optimization, financial modeling, and traffic management, serving Japanese enterprises and research institutions with quantum computing solutions that address real-world optimization challenges across telecommunications, transportation, and business intelligence applications as part of Japan’s national quantum computing strategy.

NEC Corporation Quantum Annealing Division

NEC Corporation’s quantum annealing division develops annealing simulators based on vector computers for large-scale combinatorial optimization problems. Building on NEC’s extensive supercomputing expertise including the SX-Aurora TSUBASA vector engine, the quantum annealing division creates classical optimization systems inspired by quantum annealing principles. NEC’s approach provides near-term optimization solutions while positioning the company for future quantum annealing hardware development.

Company Information

• Founded: 1899
• Country: Japan
• Website: https://www.nec.com
• Categories: quantum processors, quantum annealing

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NEC Quantum

NEC Corporation launched quantum annealing research and development program in December 2018, developing quantum annealing machines and quantum optimization technologies. The Japanese technology giant applies quantum computing to optimization problems in logistics, scheduling, and resource allocation, while also researching superconducting quantum processors and quantum cryptography solutions as part of Japan’s national quantum initiative.

Company Information

• Founded: 2018
• Country: Japan
• Website: https://www.nec.com
• Categories: quantum processors, quantum annealing

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NTT

NTT (Nippon Telegraph and Telephone) develops quantum networking and quantum computing services through their quantum research programs, focusing on quantum communication networks, quantum key distribution systems, and quantum internet infrastructure while conducting research in quantum computing technologies, providing quantum-safe communication services and developing quantum network protocols to enable secure quantum communications and distributed quantum computing applications across Japan’s telecommunications infrastructure.

Company Information

• Founded: 2019
• Country: Japan
• Website: https://ntt.com
• Categories: services

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NTT Data

NTT Data Corporation is a Japanese multinational information technology service and consulting company founded in 1967, headquartered in Tokyo, Japan, part of NTT Group. NTT Data provides quantum computing services including quantum algorithm development, quantum consulting, and quantum software engineering for enterprise clients. The company collaborates with quantum computing providers offering quantum expertise and quantum implementation services across industries. NTT Data explores quantum applications for financial services, telecommunications, manufacturing, and public sectors. The company serves global enterprises requiring quantum computing services and quantum technology consulting. NTT Data contributes to Japan quantum technology ecosystem advancing quantum software development and quantum technology adoption representing Japanese IT services industry quantum capabilities supporting enterprise quantum transformation and quantum computing integration for business optimization and computational advantage.

NTT Quantum Technology Division

Nippon Telegraph and Telephone Corporation (NTT) is a Japanese telecommunications company founded in 1952 and headquartered in Tokyo, Japan, with Quantum Technology Division developing quantum communications, quantum key distribution, and quantum networking systems. NTT conducts pioneering quantum networking research deploying QKD networks and quantum-safe telecommunications infrastructure in Japan. The company researches quantum network technologies and quantum security, having demonstrated quantum tokens for secure transactions in 2021. NTT collaborates with Japanese quantum technology companies and government initiatives advancing practical quantum communications deployments. In early 2024, NTT joined forces with Fujitsu, Hitachi, NEC, and Mitsubishi Electric on quantum technology initiatives building national quantum secure networking testbed. NTT invests in quantum cryptography, quantum random number generation, and post-quantum cryptography preparing telecommunications infrastructure for quantum computing threats. The company serves Japanese telecommunications markets, government agencies, financial institutions, and critical infrastructure sectors requiring quantum-safe communications and quantum networking infrastructure supporting Japan’s quantum technology leadership.

OpenJij

OpenJij is an open-source heuristic optimization library for the Ising model and QUBO developed by Jij Inc., a Japanese startup. Led by Chief Engineer and CTO Kohji Nishimura, a Tokyo Tech Institute of Technology Nishimori lab faculty member, OpenJij hopes to achieve a unified annealing platform. Provides high-speed simulated annealing solver for QUBO and Ising models with user-friendly Python interface for seamless integration with other optimization tools. Supports simulated and simulated quantum annealing, facilitating research in quantum computing technologies. Licensed under Apache License Version 2.0, fully open source for transparency and flexibility. Actively maintained on GitHub and continues to be used in advanced quantum computing research in 2024. Jij Inc. brings together experts in mathematical optimization and quantum technology serving the energy value chain sector and wide range of industries globally.

OptQC

OptQC is a Japanese photonic quantum computing company founded in 2021, developing optical quantum computers using photonic qubits for quantum computing applications. The company focuses on building scalable photonic quantum computing systems that operate at room temperature using integrated photonics technology, offering advantages in networking capabilities and system integration compared to other quantum computing approaches. OptQC develops quantum software and algorithms optimized for photonic quantum computing platforms, targeting applications in optimization, machine learning, and quantum simulation for Japanese enterprises and research institutions. The company contributes to Japan’s national quantum technology initiative by advancing photonic quantum computing capabilities and collaborating with academic research institutions to commercialize quantum technologies for practical applications in finance, logistics, and scientific computing.

Panasonic

Panasonic Holdings Corporation is a Japanese multinational electronics company founded in 1918, headquartered in Osaka, Japan. Panasonic explores quantum technologies including quantum materials for electronics, quantum computing research, and quantum sensor development. The company investigates quantum materials for advanced batteries and energy storage systems. Panasonic collaborates with quantum research institutions and universities advancing quantum materials science and quantum technology applications. The company serves consumer electronics, automotive, industrial systems, and energy markets. Panasonic contributes to Japan quantum technology ecosystem through quantum materials research and quantum technology exploration representing Japanese electronics industry quantum innovation for materials science and advanced electronics applications advancing quantum-enhanced materials and quantum technology integration in industrial systems.

QC Design

QC Design is a Japanese quantum software company founded in 2021 developing quantum circuit design tools and quantum algorithm development platforms. The company provides software solutions for quantum computing including quantum circuit optimization, quantum algorithm simulation, and quantum software development tools. QC Design focuses on practical quantum applications for chemistry, materials science, and optimization problems. The company collaborates with Japanese quantum computing companies and research institutions advancing quantum software ecosystem in Japan. QC Design serves quantum researchers, quantum software developers, and enterprises exploring quantum computing applications requiring quantum circuit design tools and quantum algorithm development platforms. The company contributes to Japan quantum technology ecosystem advancing quantum software development and quantum computing accessibility for scientific and industrial applications.

QIDO Platform

QIDO Platform (Quantum-Integrated Discovery Orchestrator) is a partnership between Mitsui, Quantinuum, and QSimulate for drug and materials discovery targeting catalysts, enzymes, batteries, and reaction mechanisms. The collaborative platform integrates quantum computing into discovery workflows. QIDO represents a major industrial initiative to apply quantum computing to materials science and drug development challenges with commercial and scientific value.

Company Information

• Founded: 2025
• Country: Japan
• Website: N/A
• Categories: quantum chemistry, quantum platform

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Qu-TES

Qu-TES (Quantum Technology for Energy Security) focuses on quantum sensing technologies for energy applications, developing quantum sensors and measurement systems based on quantum technology. The Japanese company works on practical applications of quantum sensing for industrial and energy sector use cases, representing Japan’s growing quantum technology ecosystem beyond quantum computing to include quantum sensing and metrology applications.

Company Information

• Founded: 2021
• Country: Japan
• Website: https://qu-tes.co.jp
• Categories: quantum sensors

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Quantum Biosystems

Quantum Biosystems is a Japanese research organization founded in 2013 exploring quantum effects in biological systems and developing quantum biology applications. The organization investigates quantum phenomena in photosynthesis, enzyme catalysis, avian navigation, and neural processes. Quantum Biosystems conducts research at intersection of quantum physics and biology exploring potential quantum computing applications for biological modeling and drug discovery. The organization publishes research journal Quantum Biosystems advancing scientific understanding of quantum effects in living systems. Quantum Biosystems serves scientific research community exploring quantum biology, quantum-enhanced biological modeling, and quantum computing applications in life sciences. The organization contributes to interdisciplinary quantum research advancing understanding of quantum phenomena in biological systems and potential applications in medicine, agriculture, and biotechnology.

QuEL

QuEL is an Osaka University-affiliated startup established in 2021 that supplies novel qubit controllers for quantum computing researchers. The company develops advanced control electronics and software for precise qubit manipulation in quantum computers. QuEL’s technology enables improved quantum gate fidelity and better overall quantum computer performance through sophisticated control systems.

Company Information

• Founded: 2021
• Country: Japan
• Website: https://www.quel.jp
• Categories: quantum control, hardware

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Quemix

Quemix is a leading R&D venture focusing on quantum technology, covering quantum computing, communication, and sensors. The company is a specified subsidiary of TerraSky Co., Ltd. and has consistently dedicated itself to developing algorithms that excel on FTQC (fault-tolerant quantum computing). Quemix provides Quloud, a cloud-based materials computation platform offering access to leading materials computation software. The company collaborates with academia and industry on epoch-making achievements in material development, drug discovery, logistics, and entertainment. In a groundbreaking collaboration, Honda R&D and Quemix developed the world’s first technology to read out quantum states and successfully performed practical calculation for materials development on a logical qubit using an actual quantum computer. JIC Venture Growth Investments acquired shares in Quemix through its JIC Venture Growth Fund 1.

QunaSys

QunaSys is a Japanese quantum software company founded in 2018 that specializes in quantum chemistry software and molecular simulation applications, developing quantum algorithms and computational tools for chemical and pharmaceutical research, materials science, and drug discovery, providing software platforms that leverage quantum computing to solve complex molecular and chemical problems that are challenging for classical computers, serving research institutions and companies in Japan and globally seeking quantum advantages in chemical simulation and materials research.

Rakuten

Rakuten Group Inc. is a Japanese electronic commerce and online retailing company founded in 1997, headquartered in Tokyo, Japan, operating Rakuten Mobile telecommunications service. Rakuten explores quantum technologies through Rakuten Institute of Technology conducting quantum computing research and quantum algorithm development. The company investigates quantum applications for e-commerce optimization supply chain management and telecommunications network optimization. Rakuten collaborates with quantum computing providers and research institutions exploring practical quantum applications for business operations. The company serves e-commerce fintech telecommunications and digital content markets. Rakuten contributes to Japan quantum technology ecosystem advancing quantum research and quantum technology adoption representing Japanese technology industry quantum innovation for e-commerce optimization and telecommunications applications supporting quantum technology commercialization.

RIKEN

RIKEN (Institute of Physical and Chemical Research) is Japan’s largest comprehensive research institution founded in 1917, headquartered in Wako, Saitama. RIKEN conducts quantum computing research through RIKEN Center for Quantum Computing (RQC) developing superconducting quantum computers and quantum algorithms. The institute collaborates with industry partners including Fujitsu developing quantum processors and quantum applications. RIKEN quantum research spans quantum hardware quantum software quantum algorithms and quantum applications for scientific computing. The institute serves Japanese quantum technology ecosystem advancing quantum computing hardware development and quantum research. RIKEN contributes to Japan national quantum strategy positioning Japan as quantum technology leader through world-class quantum research facilities quantum processor development and quantum computing commercialization supporting Japanese quantum innovation.

RIKEN RQC-FUJITSU Collaboration Center

RIKEN RQC-FUJITSU Collaboration Center is a joint research center that developed Japan’s 256-qubit superconducting quantum computer in April 2025, scaling up from 64 qubits in 2023. This public-private partnership between Japan’s premier research institute RIKEN and leading technology company Fujitsu represents Japan’s national quantum computing program. The center focuses on developing both quantum hardware and algorithms for scientific computing and industrial applications, establishing Japan as a significant player in superconducting quantum computing.

SoftBank

SoftBank Group Corp. is a Japanese multinational conglomerate founded in 1981, headquartered in Tokyo, Japan. SoftBank invests in quantum technology companies through SoftBank Vision Fund and corporate ventures including quantum computing startups and quantum technology providers. The company telecommunications division explores quantum-safe security for mobile networks and quantum communications technologies. SoftBank collaborates with quantum technology companies advancing quantum technology commercialization and quantum innovation. The company serves telecommunications, technology investment, and venture capital markets supporting quantum startup growth and quantum technology development. SoftBank contributes to Japan and global quantum technology ecosystem through strategic investments in quantum computing companies and quantum technology ventures advancing quantum innovation and quantum industry development representing Japanese technology investment in quantum computing sector worldwide.

Sony

Sony Group Corporation is a Japanese multinational conglomerate founded in 1946, headquartered in Tokyo, Japan. Sony explores quantum technologies including quantum sensing for imaging applications, quantum dot technologies, and quantum computing research. The company Sony Computer Science Laboratories conducts quantum information research and quantum algorithm development. Sony investigates quantum sensors for advanced imaging systems and quantum-enhanced detection for consumer electronics. The company collaborates with quantum research institutions exploring practical quantum applications for imaging, sensing, and computing. Sony serves consumer electronics, entertainment, imaging, and technology markets. The company contributes to Japan quantum technology ecosystem advancing quantum sensor development and quantum computing research representing Japanese technology industry quantum innovation for consumer and industrial applications.

Tokyo Quantum Computing

Tokyo Quantum Computing develops integrated quantum hardware and software solutions combining superconducting quantum processors with quantum development tools and algorithms, focusing on advancing Japan’s quantum computing capabilities through full-stack quantum systems for research institutions and commercial applications in optimization and machine learning.

Company Information

• Founded: 2020
• Country: Japan
• Website: https://tokyoquantum.com
• Categories: quantum processors, quantum software

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Toshiba Quantum

Toshiba develops quantum key distribution systems and quantum communication technologies as part of their advanced research and technology portfolio, creating QKD networks and quantum-safe communication solutions for secure data transmission, building quantum cryptography infrastructure for telecommunications and government applications while conducting fundamental research in quantum information science, contributing to Japan’s quantum communication initiatives and providing quantum security solutions that protect sensitive communications against both classical and quantum computing threats through advanced quantum cryptographic protocols and hardware systems.

Toyota

Toyota Motor Corporation is a Japanese multinational automotive manufacturer founded August 28, 1937, headquartered in Toyota City, Aichi, partnering with D-Wave Systems in 2017 to explore quantum computer applications in next-generation vehicles. D-Wave worked with Toyota on traffic-based problem involving 4-way traffic light intersection optimization demonstrating quantum annealing for real-world automotive applications. Toyota applies quantum computing to traffic flow optimization, electric charging station real-time data calculations, battery chemistry improvements, and machine learning algorithm development for autonomous driving systems. Toyota invests in quantum computing research for vehicle route optimization, supply chain management, manufacturing process optimization, and materials science for advanced automotive technologies. Toyota serves global automotive market requiring quantum-enhanced optimization for electric vehicle development, autonomous driving, smart mobility solutions, and sustainable transportation systems. Toyota collaborates with quantum computing companies advancing practical quantum applications for automotive industry transformation.

ULVAC

ULVAC is developing next-generation dilution refrigerators specifically for quantum computing in partnership with IBM, with deployment planned for 2026. The company installed its first system supporting Japan’s fully domestic quantum computer at Osaka University in April 2025, achieving stable 10 mK temperatures with modular architecture suitable for both research and scalable quantum systems. ULVAC’s partnership with IBM includes testing at IBM’s quantum data center in Poughkeepsie, New York, advancing the global supply chain for cryogenic quantum equipment.

ULVAC CRYOGENICS

ULVAC CRYOGENICS INC. is a Japanese company developing next-generation dilution refrigerators for quantum computers with input from IBM, strengthening Japan’s domestic supply of cryogenic systems essential for quantum research and commercialization. ULVAC conducts evaluation tests in collaboration with IBM, including testing at IBM’s quantum data center in Poughkeepsie, New York, with industry deployment scheduled for early 2026. The system features high cooling performance maintaining cryogenic temperatures at 10mK level, scalable modular design for future large-scale quantum environments, and in-house manufacturing of core components including dilution refrigerators, pulse-tube cryocoolers, and vacuum components. In April 2025, ULVAC installed a dilution refrigerator at the University of Osaka Center for Quantum Information and Quantum Biology, supporting Japan’s first fully domestically built quantum computer. ULVAC establishes domestic production framework to reduce dependence on overseas manufacturers.

ULVAC Inc.

ULVAC is a Japanese vacuum equipment company developing next-generation dilution refrigerators for quantum computers with IBM input, featuring 10 millikelvin performance with delivery scheduled for 2026. The company leverages decades of vacuum technology expertise to address quantum computing cryogenics challenges. ULVAC’s collaboration with IBM on dilution refrigerator development represents Japan’s strategic efforts to build domestic quantum computing infrastructure capabilities and reduce dependence on European cryogenic equipment suppliers.

Company Information

• Founded: 1952
• Country: Japan
• Website: https://www.ulvac.co.jp
• Categories: cryogenics, quantum components

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University of Tokyo

University of Tokyo is a public research university founded in 1877, located in Tokyo, Japan, most prestigious university in Japan. The university conducts leading quantum research through multiple departments and research centers advancing quantum computing quantum materials quantum optics and quantum information science. University of Tokyo researchers contribute to quantum algorithm development quantum error correction quantum hardware and quantum applications. The university collaborates with industry partners including Japanese quantum companies and international quantum institutions. University of Tokyo has produced numerous quantum technology spinouts and maintains strong quantum research programs. The university serves quantum research community through fundamental quantum research quantum education programs and technology transfer advancing quantum information science and positioning Japan as quantum technology leader in Asia supporting quantum innovation.