ROQUO has entered operation at RIKEN’s Kobe campus after installation, giving Japan’s hybrid-computing program a new HPC backbone validated at 19.80 petaflops on the full 135-node cluster.
135 compute nodes built on NVIDIA GB200 NVL4 combine 540 Blackwell GPUs, 270 Grace CPUs and Quantum-X800 InfiniBand links of up to 3.2 terabits per second to support tightly coupled classical-quantum workloads.
ROQUO is physically connected to Fugaku, IBM Quantum System Two in Kobe and Quantinuum’s Reimei system, letting researchers run hybrid applications, large-scale quantum circuit simulations and benchmark quantum outputs against classical references.
32°C warm-water cooling using outside-air towers cuts facility power use by about 20% versus standard air-cooled setups, a design R-CCS says will inform development of the next flagship machine, FugakuNEXT.
R-CCS will open the system to scientists and industry through a test-user program, with early work centered on quantum machine learning, algorithm optimization and post-5G secure communications.
How will Japan's new hybrid quantum supercomputer reshape the global race for AI dominance?
By linking quantum and classical computers, what previously impossible scientific problems can ROQUO now solve?
What does ROQUO’s advanced liquid cooling reveal about the future of energy-efficient data centers?
Japan’s ROQUO Supercomputer Achieves 19.80 Petaflops: Pioneering Quantum-HPC Hybrid Integration for National Innovation
Overview
The RIKEN Center for Computational Science (R-CCS) launched the ROQUO supercomputer on June 19, 2026, at its Kobe campus, marking a major step for Japan’s advanced computing goals. ROQUO was completed as planned and is designed to be the core of the Quantum-HPC Hybrid Platform. Its main purpose is to speed up the integration of quantum computing with high-performance computing (HPC), which is central to the JHPC-quantum project. This project aims to combine the strengths of both quantum and classical computing, helping Japan explore new frontiers in computational science and technology.