Quantinuum (NASDAQ:QNT) and RIKEN announced on November 10, 2026 an expansion of their collaboration, anchored by the successful upgrade of the Reimei quantum computer at RIKEN to Quantinuum's H2 system, and including a new three-party agreement with SoftBank Corp. to explore connecting quantum computers to AI data centers in Japan.

Key Highlights

  • Reimei upgraded to H2: The Reimei quantum computer, installed at RIKEN and operating under the NEDO-funded JHPC-quantum project, has completed its upgrade to Quantinuum's H2 system model.
  • Fault-tolerant quantum computer goal: Quantinuum and RIKEN signed a new Memorandum of Understanding to pursue joint development of a fault-tolerant quantum computer described as "Made with Japan," involving Japanese universities and domestic component suppliers.
  • SoftBank three-party agreement: Under a separate agreement, Quantinuum, RIKEN, and SoftBank Corp. will explore directly connecting quantum computers to AI data centers in Japan and evaluate infrastructure readiness for commercial hybrid quantum-AI computing services.
  • Magnetism simulation research: Preliminary results from an ongoing project using RIKEN's ROQUO supercomputer with quantum data generated by Reimei suggest the trained AI model can make more accurate predictions than models trained only on classical simulations.
  • Biomolecular simulation project: A second project combines Reimei, RIKEN's Fugaku supercomputer, and NVIDIA's evolutionary AI agent running on ROQUO to simulate a complex photoactive biomolecule at an unprecedented scale of detail.
  • NEDO funding: The project is supported by Japan's New Energy and Industrial Technology Development Organization (NEDO) under the Ministry of Economy, Trade and Industry (METI), within the framework designated JPNP20017.

Quantinuum and RIKEN Extend Quantum-HPC-AI Platform After H2 Upgrade

According to the filing, the Reimei quantum computer installed at RIKEN has successfully completed its upgrade from the previous H1 system to Quantinuum's H2 system model. The company disclosed that this upgrade enhances the capabilities of the quantum-HPC hybrid computing platform under the JHPC-quantum project, allowing researchers to study more complex quantum systems that are increasingly difficult to simulate using classical computing alone.

The filing states that Quantinuum and RIKEN will use the upgraded platform to combine quantum computing, supercomputing, and AI, targeting use cases in electronics, energy, and life sciences. Two research projects already operating on Reimei before its public service launch were described in the disclosure. The first uses RIKEN's ROQUO GPU quantum supercomputer to train an AI model on quantum data generated by Reimei for magnetism simulations, with preliminary results the filing describes as suggesting more accurate predictions than AI models trained on classical simulations alone. The second project combines Reimei, the Fugaku supercomputer, and NVIDIA's evolutionary AI agent on ROQUO to simulate a complex photoactive biomolecule at a scale the filing characterizes as "unprecedented."

The filing also discloses that the partners signed a new Memorandum of Understanding covering expanded joint research, and that a separate independent agreement brings SoftBank Corp. into a three-party arrangement. According to the disclosure, the three parties will assess infrastructure readiness and examine how connected quantum-AI systems could support commercial hybrid computing services, extending access beyond the research community. The filing notes the research aligns with a "planned $1 billion partnership" under the U.S. Genesis Mission, though this characterization is the company's own.

What Was Disclosed

Quantinuum disclosed an expansion of its collaboration with RIKEN following the successful upgrade of the Reimei quantum computer to the H2 system, the signing of a new MOU for fault-tolerant quantum computer development, and a separate three-party agreement with SoftBank Corp. to explore quantum-AI data center integration in Japan.