RIKEN Unveils ROQUO to Advance Quantum-HPC Integration
RIKEN, Japan's leading national research institute, has brought its new JHPC-quantum GPU supercomputer ROQUO online at the Kobe campus of the RIKEN Center for Computational Science. The platform marks a significant step in combining quantum computing capabilities with high-performance computing systems. Named after Mount Rokko, the landmark mountain near Kobe, ROQUO supports the full-scale integration of quantum technologies with traditional supercomputing resources.
The system entered operation on June 19, 2026, following development led by the Quantum-HPC Hybrid Platform Division at R-CCS. Construction was completed as planned, enabling researchers to begin exploring hybrid applications that leverage the strengths of both quantum processors and classical high-performance computing infrastructure.
Background on the JHPC-quantum Initiative
The ROQUO platform forms a core component of the JHPC-quantum project. This collaborative effort involves RIKEN alongside SoftBank Corporation, the University of Tokyo, and Osaka University. The project focuses on developing system software that connects quantum computers with supercomputers, creating a multi-platform environment for testing and deploying hybrid computations.
Initial phases of the project emphasized software development using cloud-based quantum resources. With ROQUO now operational, the initiative advances to on-premises hardware integration. Supercomputers from partner universities will connect to the platform alongside RIKEN's Fugaku system, expanding access for academic researchers across Japan.
Technical Specifications and Capabilities
ROQUO functions as a GPU-accelerated supercomputer tailored for quantum-HPC hybrid workloads. It provides the computational backbone needed to run hybrid applications that combine quantum algorithms with classical simulations. The platform supports demonstrations of quantum advantage in areas such as materials science, chemistry, and optimization problems where traditional HPC alone faces limitations.
Integration with quantum hardware, including upgrades to systems like Quantinuum's Reimei trapped-ion quantum computer, allows researchers to test hybrid workflows in a controlled environment. The setup facilitates comparison of results from noisy intermediate-scale quantum devices against error-corrected or simulated outcomes.
Role of RIKEN Center for Computational Science
The RIKEN Center for Computational Science leads the technical development and operation of ROQUO. Division Director Mitsuhisa Sato oversees the Quantum-HPC Hybrid Platform Division, which focuses on system software and platform architecture for seamless quantum-classical integration.
R-CCS researchers work on deploying hybrid applications as a service model, targeting the post-5G era. This approach aims to make advanced hybrid computing resources accessible to a broader community of scientists and engineers in academia and industry.
University Collaborations and Research Access
ROQUO strengthens ties between RIKEN and leading Japanese universities. The University of Tokyo and Osaka University participate directly in the JHPC-quantum project, enabling their researchers and students to utilize the hybrid platform for joint experiments.
Academic users can access the system through established channels such as the JHPC-quantum portal. This expands opportunities for university-based teams to explore quantum-enhanced simulations without requiring separate quantum hardware investments.
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Implications for Higher Education and Workforce Development
The launch of ROQUO highlights growing demand for expertise at the intersection of quantum computing and high-performance computing. Japanese universities are positioned to develop new curricula and research programs that prepare students for roles in hybrid computing environments.
PhD candidates and postdoctoral researchers in physics, computer science, and engineering fields gain practical experience with cutting-edge platforms. Institutions may expand graduate programs to include hybrid algorithm design and quantum software development, aligning training with national research priorities.
Broader National Context in Japanese Research Infrastructure
ROQUO contributes to Japan's strategic push toward quantum technology leadership. The platform complements existing national supercomputing resources and supports goals outlined in government science and technology plans for integrated computing ecosystems.
By hosting the system at the Kobe campus, RIKEN provides a centralized hub that benefits researchers nationwide. This infrastructure supports both fundamental studies and applied projects with potential industrial applications.
Future Outlook and Expansion Plans
Following the operational launch, the JHPC-quantum project will continue expanding connections between additional quantum computers and supercomputing resources. Plans include linking systems at multiple RIKEN sites and partner institutions to create a more robust hybrid network.
Researchers anticipate that ROQUO will accelerate demonstrations of practical quantum advantage in real-world applications. Continued software development will focus on user-friendly interfaces and performance optimization for hybrid workloads.
Stakeholder Perspectives on Research Advancement
Division leadership at R-CCS emphasizes the platform's role in moving beyond proof-of-concept experiments toward utility-scale hybrid computing. Academic partners highlight opportunities for cross-institutional collaboration that strengthens Japan's overall research capacity.
University administrators note the value of shared infrastructure in reducing barriers for smaller research groups. This model supports equitable access to advanced computing tools across the higher education sector.
Opportunities for International Engagement
While primarily serving Japanese institutions, the ROQUO platform and JHPC-quantum project offer potential for international research partnerships. Foreign academics and institutions interested in Japan’s quantum ecosystem may explore collaboration pathways through established RIKEN programs.
The development aligns with global trends in hybrid quantum-classical computing, positioning Japanese universities as attractive destinations for researchers seeking experience with operational hybrid platforms.
Photo by Google DeepMind on Unsplash
Conclusion and Next Steps for the Research Community
The operational launch of ROQUO represents a milestone in Japan's quantum-HPC hybrid computing efforts. By combining advanced GPU supercomputing with quantum resources, the platform opens new avenues for scientific discovery and technological innovation.
University researchers, graduate students, and administrators are encouraged to monitor updates from R-CCS and the JHPC-quantum project for access opportunities and training initiatives. Continued investment in such infrastructure supports the development of a skilled workforce capable of advancing hybrid computing applications.