Japan

Fujitsu - Quantum Computing Company Profile | Quantum Navigator

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

Key People

Shintaro Sato (Head Quantum Computing), Jun Sawada (President)

Jij Inc - Quantum Computing Company Profile | Quantum Navigator

Jij Inc

Jij Inc is a Japanese quantum optimization software company founded in 2018 that develops quantum annealing algorithms and optimization software solutions for solving complex combinatorial optimization problems in logistics, finance, manufacturing, and operations research, providing quantum-inspired algorithms and cloud-based optimization services that leverage both quantum annealers and classical high-performance computing to deliver practical optimization solutions for Japanese enterprises and research institutions seeking quantum advantages in scheduling, routing, and resource allocation problems.

Mitsubishi - Quantum Computing Company Profile | Quantum Navigator

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.

NEC - Quantum Computing Company Profile | Quantum Navigator

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.

NTT - Quantum Computing Company Profile | Quantum Navigator

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: quantum consulting

Key People

Akira Furusawa (Senior Researcher), Atsushi Tackeuchi (Senior VP)

OptQC - Quantum Computing Company Profile | Quantum Navigator

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.

QunaSys - Quantum Computing Company Profile | Quantum Navigator

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.

Tokyo Quantum Computing - Quantum Computing Company Profile | Quantum Navigator

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.

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Toshiba Quantum - Quantum Computing Company Profile | Quantum Navigator

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.