Fugaku node architecture
Fugaku is operated by RIKEN Center for Computational Science in Japan. This profile covers the documented compute inventory.
Cluster interconnect: Tofu interconnect D. Topology: 6D mesh / torus.
A64FX compute
- Node count
- 158976
- CPU
- Fujitsu A64FX · 48 compute cores
- CPUs per node
- 1
- Accelerator
- No accelerator
- Physical accelerators per node
- 0
- Host / unified memory
- 32 GiB HBM2
- Accelerator memory
- Not verified
- Local accelerator links
- Not applicable
- CPU-to-accelerator link
- Not verified
- Storage
- Not verified
Scope and uncertainty
The overview is a 2D projection of the 6D network, with omitted dimensions and wraparound links. Nodes connect through integrated network interfaces.
Not verified means a detail has not been confirmed in this catalog. Diagrams are schematic; node indices are illustrative, not physical hostnames. Data checked 13 September 2026.
Sources
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