Supercomputers/Systems/FugakuNEXT
Japan · planned · mixed
FugakuNEXT
Deep dive: Fugaku: the CPU-only No. 1 and its successor
Operated by RIKEN at RIKEN Center for Computational Science .
Phase 1 seed dataset, compiled by hand. These rows were built from public operator, laboratory and vendor sources. A mechanical second-reader pass has since fetched every cited source: 1092 of 1153 systems have a readable citation that names them, and 40 are genuinely weakly sourced. Every claim carries its source and a confidence tier. Treat anything below verified as a lead, not a citation.
Measured performance
- Rmax
- -
- Rpeak
- -
- Rmax ÷ Rpeak
- -
- Cores
- -
- Power
- -
- Per watt
- - GF/W
Figures are as last publicly reported for the configuration described below, not a live measurement. Where a system was upgraded in place, the post-upgrade configuration is shown and the earlier one appears in the timeline.
What this machine is made of
One row per supplier relationship. “Supplier at build” is the company that shipped the part at the time; where that company has since been acquired, the parent it rolls up to today is shown beside it. That distinction is what makes ticker-level aggregation possible across a thirty-year dataset.
| Role | Part | Supplier at build | Quantity | Confidence | Source |
|---|---|---|---|---|---|
| Integrator | - Fujitsu leads basic design of the overall system, compute nodes and CPUs | Fujitsu | - | Reported | riken.jp |
| Accelerator | - NVIDIA-designed GPU infrastructure, paired with the CPUs via NVLink Fusion | NVIDIA | - | Reported | riken.jpinvestor.nvidia.com |
| CPU | - FUJITSU-MONAKA-X Arm CPU | Fujitsu | - | Reported | riken.jpinvestor.nvidia.com |
The read
Successor to Fugaku, announced by RIKEN with Fujitsu and NVIDIA on 22 August 2025. RIKEN says it will be deployed adjacent to the Kobe site and is expected to enter operation around 2030. It will pair FUJITSU-MONAKA-X Arm CPUs with NVIDIA-designed GPUs (the first GPU-accelerated Japanese flagship), targets more than 600 exaFLOPS of FP8 (sparse) AI performance and up to a hundredfold application speedup over Fugaku, within the same roughly 40 MW power constraint as Fugaku. Basic design was due in fiscal 2025 and detailed design starts in fiscal 2026. The 40 MW figure is a design constraint, not a measured draw. NVIDIA's November 2025 release separately describes two RIKEN Blackwell GB200 NVL4 systems (1,600 and 540 GPUs) for AI-for-science and quantum workflows.
Timeline
- 2025-08-22 Announced source
Site & facility
RIKEN Center for Computational Science
- Location
- Kobe, Japan
- Cooling
- Direct liquid cooling (warm water)
- Commissioned
- 2010
Change history
- 2026-10-02 Added FugakuNEXT, RIKEN's planned zettascale-AI successor to Fugaku
Source check
We fetched this system's own citations and recorded whether each page actually mentions it. This is a corroboration signal, not a fact check, and it is published so you can see how well the sourcing holds up rather than take it on trust.
None of the cited sources could be read from our network: the hosts returned bot challenges or did not respond. This check says nothing about the citations either way. See how this check works.
| Cited source | Result | Found on the page |
|---|---|---|
| investor.nvidia.com | could not be fetched | - |
| riken.jp | blocked our fetch | - |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.