Quantinuum Upgrades Reimei and Broadens RIKEN Quantum-AI Partnership

What happened

On November 10, 2026, Quantinuum and RIKEN announced they had finished upgrading the Reimei quantum computer to a 56-qubit System Model H2 at RIKEN's Wako campus. The two organizations also expanded their partnership to develop a fault-tolerant quantum computer and to work on quantum-AI hybrid services in Japan, including a new agreement with SoftBank. The upgraded Reimei system now works alongside classical computing resources to address complex scientific problems. The partnership includes collaborations with companies such as SoftBank and NVIDIA.

Key details

• Reimei was upgraded from the H1 system to the 56-qubit System Model H2.
• A memorandum of understanding was signed to expand research into quantum computing for AI for Science.
• ROQUO, part of the platform, uses 540 NVIDIA Blackwell GPUs via the GB200 NVL4 platform.
• Early research projects include quantum-AI workflows for materials science and molecular modeling.
• The SoftBank agreement will assess integrating quantum computers with AI data centers for potential commercial hybrid services.

Why it matters

Japanese researchers and technology companies now have access to a more advanced quantum computing platform that can be integrated with classical and AI systems. This upgrade enables larger and more complex scientific problems to be tackled, and the expanded partnerships could lead to new commercial services if the technology proves scalable and reliable. Organizations involved in AI, scientific research, and data center operations in Japan may benefit from new capabilities and collaborations as a result of these developments.