| System | Year | Vendor | Cores | Rmax (GFlop/s) | Rpeak (GFlop/s) |
| Pegasus - NEC LX 102Bk-6, Xeon Platinum 8468 48C 2.1GHz, NVIDIA H100 PCIe 80GB, Infiniband NDR200, Ubuntu 22.04 | 2023 | NEC | 27,000 | 4,342,000 | 8,133,840 |
| Cygnus - NEC LX Cluster, Xeon Gold 6126 12C 2.6GHz, NVIDIA Tesla V100, InfiniBand HDR100 | 2019 | NEC | 27,520 | 1,582,000 | 2,399,744 |
| COMA (PACS-IX) - Cray CS300 1027GR, Intel Xeon E5-2670v2 10C 2.500GHz, Infiniband FDR, Intel Xeon Phi 7110P | 2014 | Cray/HPE | 55,664 | 745,997 | 998,502 |
| HA-PACS - Xtreme-X GreenBlade 8204, Xeon E5-2670 8C 2.600GHz, Infiniband QDR, NVIDIA 2090 | 2012 | Cray/HPE | 20,800 | 421,600 | 778,128 |
| HA-PACS TCA - Cray CS300 Cluster, Intel Xeon E5-2680v2 10C 2.800GHz, Infiniband QDR, NVIDIA K20x | 2013 | Cray/HPE | 4,864 | 277,100 | 364,288 |
| T2K Open Supercomputer - Appro Xtreme-X3 Server - Quad Opteron Quad Core 2.3 GHz, Infiniband | 2009 | Cray/HPE | 10,368 | 77,280 | 95,385 |
| T2K Open Supercomputer - Appro Xtreme-X3 Server - Quad Opteron Quad Core 2.3 GHz, Infiniband | 2008 | Cray/HPE | 10,000 | 76,460 | 92,000 |
| PACS-CS - PACS-CS, low voltage Xeon 2.8 GHz, 3D Hyper-Crossbar | 2006 | Hitachi/Fujitsu | 2,560 | 10,350 | 14,336 |
| CP-PACS/2048 | 1996 | Hitachi/Tsukuba | 2,048 | 368.2 | 614.4 |
| SR8000-G1/12 | 2002 | Hitachi | 12 | 150.1 | 172.8 |
