https://computeatlas.net/supercomputers/country/japanChanges to systems in Japan in the Compute Atlas dataset.enFri, 09 Oct 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/sango2026-10-09/system/sango/Added SangoFri, 09 Oct 2026 12:00:00 GMTOIST university-shared cluster: Supermicro blades with Xeon E5-2680v3, Xeon Phi 7120P and InfiniBand FDR; added OIST.https://computeatlas.net/supercomputers/systems/shirokane32026-10-09/system/shirokane3/Added Shirokane3Fri, 09 Oct 2026 12:00:00 GMTHuman Genome Center, University of Tokyo HPE Apollo 6000 cluster with 475 nodes and 24 Xeon Phi nodes.https://computeatlas.net/supercomputers/systems/reedbush-u2026-10-09/system/reedbush-u/Added Reedbush-UFri, 09 Oct 2026 12:00:00 GMTCPU-only Reedbush subsystem, 420 SGI Rackable nodes with Xeon E5-2695v4 on InfiniBand EDR, ended June 2020.https://computeatlas.net/supercomputers/systems/jaist-cray-xc402026-10-09/system/jaist-cray-xc40/Added JAIST Cray XC40Fri, 09 Oct 2026 12:00:00 GMT548-node Cray XC40 with Xeon E5-2695v4 at JAIST; added JAIST.https://computeatlas.net/supercomputers/systems/degima2026-10-09/system/degima/Added DEGIMAFri, 09 Oct 2026 12:00:00 GMTNagasaki University 144-node, 576-GPU astrophysics cluster; added Nagasaki University.https://computeatlas.net/supercomputers/systems/kek-sr8000-f1-1002026-10-09/system/kek-sr8000-f1-100/Added KEK SR8000-F1/100Fri, 09 Oct 2026 12:00:00 GMTHistorical TOP500 system (kek, Japan). Sources: https://www.top500.org/system/170748/ ; https://scwww.kek.jp/past_sc.htmlhttps://computeatlas.net/supercomputers/systems/issp-sr8000-f1-602026-10-09/system/issp-sr8000-f1-60/Added ISSP SR8000-F1/60Fri, 09 Oct 2026 12:00:00 GMTHistorical TOP500 system (issp, Japan). Sources: https://www.top500.org/system/170752/ ; https://scc.issp.u-tokyo.ac.jp/about/past_systemhttps://computeatlas.net/supercomputers/systems/utokyo-sr8000-mpp2026-10-09/system/utokyo-sr8000-mpp/Added UTokyo SR8000/MPPFri, 09 Oct 2026 12:00:00 GMTHistorical TOP500 system (univ-tokyo, Japan). Sources: https://www.top500.org/system/170767/ ; https://www.cc.u-tokyo.ac.jp/en/supercomputer/past/https://computeatlas.net/supercomputers/systems/utokyo-s3800-4802026-10-09/system/utokyo-s3800-480/Added UTokyo HITAC S-3800/480Fri, 09 Oct 2026 12:00:00 GMTHistorical TOP500 system (univ-tokyo, Japan). Sources: https://www.top500.org/system/168780/ ; https://www.cc.u-tokyo.ac.jp/en/supercomputer/past/https://computeatlas.net/supercomputers/systems/tohoku-sx4-128h42026-10-09/system/tohoku-sx4-128h4/Added Tohoku SX-4/128H4Fri, 09 Oct 2026 12:00:00 GMTHistorical TOP500 system (tohoku-cyberscience, Japan). Sources: https://www.top500.org/system/170820/ ; https://www.cc.tohoku.ac.jp/history/https://computeatlas.net/supercomputers/systems/tohoku-sx3-44r2026-10-09/system/tohoku-sx3-44r/Added Tohoku SX-3/44RFri, 09 Oct 2026 12:00:00 GMTHistorical TOP500 system (tohoku-cyberscience, Japan). Sources: https://www.top500.org/system/170814/ ; https://www.cc.tohoku.ac.jp/history/https://computeatlas.net/supercomputers/systems/osaka-sx5-128m82026-10-09/system/osaka-sx5-128m8/Added Osaka SX-5/128M8Fri, 09 Oct 2026 12:00:00 GMTHistorical TOP500 system (osaka-d3, Japan). Sources: https://www.top500.org/system/170921/ ; https://www.rcnp.osaka-u.ac.jp/Divisions/CN/computer/super3/Docs/introduction_e.htmlhttps://computeatlas.net/supercomputers/systems/kukai2026-10-07/system/kukai/Added KukaiWed, 07 Oct 2026 12:00:00 GMTKukai added from a Green500 placement; efficiency 14.046 GFlops/Watt on the cited list.https://computeatlas.net/supercomputers/systems/aist-ai-cloud2026-10-07/system/aist-ai-cloud/Added AIST AI CloudWed, 07 Oct 2026 12:00:00 GMTAIST AI Cloud added from a Green500 placement; efficiency 12.681 GFlops/Watt on the cited list.https://computeatlas.net/supercomputers/systems/gosat-2-rcf22026-10-07/system/gosat-2-rcf2/Added GOSAT-2 RCF2Wed, 07 Oct 2026 12:00:00 GMTGOSAT-2 RCF2 added from a Green500 placement; efficiency 9.797 GFlops/Watt on the cited list.https://computeatlas.net/supercomputers/systems/suiren22026-10-07/system/suiren2/Added Suiren2Wed, 07 Oct 2026 12:00:00 GMTSuiren2 added from a Green500 placement; efficiency 16.835 GFlops/Watt on the cited list.https://computeatlas.net/supercomputers/systems/sakura-pezy2026-10-07/system/sakura-pezy/Added Sakura (PEZY)Wed, 07 Oct 2026 12:00:00 GMTSakura (PEZY) added from a Green500 placement; efficiency 16.657 GFlops/Watt on the cited list.https://computeatlas.net/supercomputers/systems/na-12026-10-07/system/na-1/Added NA-1Wed, 07 Oct 2026 12:00:00 GMTNA-1 added from a Green500 placement; efficiency 16.256 GFlops/Watt on the cited list.https://computeatlas.net/supercomputers/systems/sora-ma-jaxa2026-10-07/system/sora-ma-jaxa/Added SORA-MA, the JAXA JSS2 main systemWed, 07 Oct 2026 12:00:00 GMT3,240 Fujitsu FX100 nodes, 3.16 PFlop/s Rmax; 24th on the June 2016 TOP500.https://computeatlas.net/supercomputers/systems/rikyu2026-10-07/system/rikyu/Added RIKYU (RIKEN)Wed, 07 Oct 2026 12:00:00 GMTRIKEN's AI for Science supercomputer: 400 GB200 NVL4 nodes with 1,600 Blackwell GPUs, in early access since mid-2026. Verified against RIKEN and NVIDIA.https://computeatlas.net/supercomputers/systems/roquo2026-10-07/system/roquo/Added ROQUO (RIKEN)Wed, 07 Oct 2026 12:00:00 GMTRIKEN's quantum-HPC GPU supercomputer: 135 GB200 NVL4 nodes with 540 Blackwell GPUs and 19.80 PFLOPS HPL, in operation since 19 June 2026. Verified against RIKEN and NVIDIA.https://computeatlas.net/supercomputers/systems/kek-sakura2026-10-07/system/kek-sakura/Added KEK SAKURAWed, 07 Oct 2026 12:00:00 GMTKEK SAKURA added from its TOP500 entry (https://www.top500.org/system/177731/) with operator and vendor sources.https://computeatlas.net/supercomputers/systems/laurel-22026-10-07/system/laurel-2/Added Laurel 2Wed, 07 Oct 2026 12:00:00 GMTLaurel 2 added from its TOP500 entry (https://www.top500.org/system/179096/) with operator and vendor sources.https://computeatlas.net/supercomputers/systems/coma-pacs-ix2026-10-07/system/coma-pacs-ix/Added COMA (PACS-IX)Wed, 07 Oct 2026 12:00:00 GMTCOMA (PACS-IX) added from its TOP500 entry (https://www.top500.org/system/178326/) with operator and vendor sources.https://computeatlas.net/supercomputers/systems/sekirei-issp2026-10-07/system/sekirei-issp/Added Sekirei (ISSP System B)Wed, 07 Oct 2026 12:00:00 GMTSekirei (ISSP System B) added from its TOP500 entry (https://www.top500.org/system/178526/) with operator and vendor sources.https://computeatlas.net/supercomputers/systems/camellia-kyoto2026-10-07/system/camellia-kyoto/Added Camellia (Kyoto)Wed, 07 Oct 2026 12:00:00 GMTCamellia (Kyoto) added from its TOP500 entry (https://www.top500.org/system/178327/) with operator and vendor sources.https://computeatlas.net/supercomputers/systems/afi-nity-tohoku-ifs2026-10-07/system/afi-nity-tohoku-ifs/Added AFI-NITY, a mid-list TOP500 system (2018-11 126)Wed, 07 Oct 2026 12:00:00 GMT35,200 cores, 1.69 PFlop/s Rmax; 126 on the 2018-11 TOP500.https://computeatlas.net/supercomputers/systems/ai-and-tenstorrent-galaxy2026-10-07/system/ai-and-tenstorrent-galaxy/Added ai& Tenstorrent Galaxy SuperclusterWed, 07 Oct 2026 12:00:00 GMTMore than 120 Tenstorrent Galaxy systems in ai&'s sovereign inference platform in Japan; added ai&.https://computeatlas.net/supercomputers/systems/abci-32026-10-04/system/abci-3/Added AI datacenter metrics for abci-3Sun, 04 Oct 2026 12:00:00 GMT3 AI datacenter metric row(s): accelerator_count, facility_power_mw, pue.https://computeatlas.net/supercomputers/systems/chie-42026-10-04/system/chie-4/Added AI datacenter metrics for chie-4Sun, 04 Oct 2026 12:00:00 GMT1 AI datacenter metric row(s): accelerator_count.https://computeatlas.net/supercomputers/systems/sakuraone2026-10-04/system/sakuraone/Added AI datacenter metrics for sakuraoneSun, 04 Oct 2026 12:00:00 GMT1 AI datacenter metric row(s): accelerator_count.https://computeatlas.net/supercomputers/systems/kddi-gpu-cloud2026-10-04/system/kddi-gpu-cloud/Added KDDI GPU Cloud, GB200 NVL72 at the Osaka Sakai Data CenterSun, 04 Oct 2026 12:00:00 GMTTelecom GPU cloud operating since January 2026, 22.21 PFlop/s on the June 2026 TOP500.https://computeatlas.net/supercomputers/systems/opencanvas-gpuaas-sp12026-10-04/system/opencanvas-gpuaas-sp1/Added OpenCanvas GPUaaS SP1, NTT DATA's DGX B200 SuperPODSun, 04 Oct 2026 12:00:00 GMTPrivate-cloud GPU service in Japan, 17.53 PFlop/s on the November 2025 TOP500.https://computeatlas.net/supercomputers/systems/cycloud-ml-platform2026-10-04/system/cycloud-ml-platform/Added Cycloud ML Platform, CyberAgent's H100 GPU platformSun, 04 Oct 2026 12:00:00 GMTKubernetes-based GPU as a Service platform, 10.82 PFlop/s on the June 2025 TOP500.https://computeatlas.net/supercomputers/systems/softbank-sakai-ai-data-center2026-10-04/system/softbank-sakai-ai-data-center/Added SoftBank Sakai AI Data Center (SoftBank Corp.)Sun, 04 Oct 2026 12:00:00 GMTSoftBank's planned 150 MW AI data center, expandable beyond 400 MW, at Sharp's former Sakai plant in Osaka.https://computeatlas.net/supercomputers/systems/laurel-32026-10-04/system/laurel-3/Added Laurel 3 (kyoto-accms)Sun, 04 Oct 2026 12:00:00 GMTNew system entry for Laurel 3 operated by kyoto-accms in Japan. Confidence: verified.https://computeatlas.net/supercomputers/systems/camphor-32026-10-02/system/camphor-3/Camphor 3 added, verified on TOP500 and Kyoto UniversityFri, 02 Oct 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/genkai2026-10-02/system/genkai/Genkai added, from TOP500 and Kyushu UniversityFri, 02 Oct 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/grand-chariot-22026-10-02/system/grand-chariot-2/Grand Chariot 2 added, from TOP500 and Hokkaido UniversityFri, 02 Oct 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/pegasus-tsukuba2026-10-02/system/pegasus-tsukuba/Pegasus (Tsukuba) added, verified on TOP500 and the University of TsukubaFri, 02 Oct 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/cygnus2026-10-02/system/cygnus/Cygnus added, from TOP500 and the University of TsukubaFri, 02 Oct 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/seiran2026-10-02/system/seiran/Added SEIRAN, Tokyo University of Technology's DGX B200 system, 374th on the November 2025 TOP500Fri, 02 Oct 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/nec-ai-research-supercomputer2026-10-02/system/nec-ai-research-supercomputer/Added NEC AI Research Supercomputer, 928 A100 GPUsFri, 02 Oct 2026 12:00:00 GMTNEC's in-house AI research system, one of the largest corporate AI clusters in Japan.https://computeatlas.net/supercomputers/systems/fugakunext2026-10-02/system/fugakunext/Added FugakuNEXT, RIKEN's planned zettascale-AI successor to FugakuFri, 02 Oct 2026 12:00:00 GMTFujitsu MONAKA-X CPUs with NVIDIA GPUs, targeted for operation around 2030 within a roughly 40 MW constraint.https://computeatlas.net/supercomputers/systems/softbank-tomakomai-ai-data-center2026-10-02/system/softbank-tomakomai-ai-data-center/Added SoftBank Tomakomai AI Data Center, Japan's 300 MW-plus Hokkaido buildFri, 02 Oct 2026 12:00:00 GMTGroundbreaking April 2025, operations scheduled for fiscal 2026.https://computeatlas.net/supercomputers/systems/oakbridge-cx2026-10-02/system/oakbridge-cx/Added Oakbridge-CX, the University of Tokyo Omni-Path cluster, 45th on the June 2019 TOP500Fri, 02 Oct 2026 12:00:00 GMTFujitsu cluster of 1,368 Xeon Platinum 8280 nodes, now terminated.https://computeatlas.net/supercomputers/systems/ito-subsystem-a2026-10-02/system/ito-subsystem-a/Added ITO Subsystem A, Kyushu University's Skylake cluster, 45th on the November 2019 TOP500Fri, 02 Oct 2026 12:00:00 GMTFujitsu PRIMERGY cluster of 2,000 Xeon Gold 6154 nodes on InfiniBand EDR.https://computeatlas.net/supercomputers/systems/kek-vpp500-802026-10-02/system/kek-vpp500-80/Added KEK's Fujitsu VPP500/80, fifth on the June 1995 TOP500Fri, 02 Oct 2026 12:00:00 GMT80 vector processing elements on a crossbar, 128 GFlop/s peak, used for lattice QCD.https://computeatlas.net/supercomputers/systems/hokusai-greatwave2026-10-02/system/hokusai-greatwave/Added HOKUSAI GreatWave, RIKEN's Fujitsu PRIMEHPC FX100 system, 70th on the June 2015 TOP500Fri, 02 Oct 2026 12:00:00 GMT1,080 SPARC64 XIfx nodes on Tofu 2 plus GPU and large-memory servers at the Wako campus.https://computeatlas.net/supercomputers/systems/hokusai-bigwaterfall2026-10-02/system/hokusai-bigwaterfall/Added HOKUSAI BigWaterfall, RIKEN's Xeon Gold 6148 cluster, 83rd on the November 2017 TOP500Fri, 02 Oct 2026 12:00:00 GMT840 PRIMERGY CX2550 M4 nodes on InfiniBand EDR with 2.58 PFLOPS peak.https://computeatlas.net/supercomputers/systems/hokusai-bigwaterfall-22026-10-02/system/hokusai-bigwaterfall-2/Added HOKUSAI BigWaterfall 2, RIKEN's 2023 Xeon Max HBM clusterFri, 02 Oct 2026 12:00:00 GMT312 PRIMERGY CX2550 M7 nodes on InfiniBand NDR, 2.12 PFLOPS peak, in service through November 2029.https://computeatlas.net/supercomputers/systems/raiden2026-10-02/system/raiden/Added RAIDEN, the RIKEN AIP deep learning supercomputer, 171st on the June 2018 TOP500Fri, 02 Oct 2026 12:00:00 GMTFujitsu-built system upgraded in 2018 to 54 DGX-1 Volta servers with 432 Tesla V100 GPUs.https://computeatlas.net/supercomputers/systems/reedbush-h2026-10-02/system/reedbush-h/Added Reedbush-H, the University of Tokyo's Tesla P100 subsystem, 204th on the June 2017 TOP500Fri, 02 Oct 2026 12:00:00 GMT120 SGI Rackable nodes with 240 P100 GPUs on InfiniBand FDR.https://computeatlas.net/supercomputers/systems/reedbush-l2026-10-02/system/reedbush-l/Added Reedbush-L, the University of Tokyo's NVLink P100 subsystem, 292nd on the November 2017 TOP500Fri, 02 Oct 2026 12:00:00 GMT64 SGI Rackable nodes with four P100 each on InfiniBand EDR.https://computeatlas.net/supercomputers/systems/earth-simulator-22026-10-02/system/earth-simulator-2/Added Earth Simulator 2, JAMSTEC's NEC SX-9/E system, 22nd on the June 2009 TOP500Fri, 02 Oct 2026 12:00:00 GMT160 vector nodes with 131 TFLOPS peak and the highest Linpack efficiency on the 2009 list.https://computeatlas.net/supercomputers/systems/earth-simulator-32026-10-02/system/earth-simulator-3/Added Earth Simulator 3, JAMSTEC's 5,120-node NEC SX-ACE systemFri, 02 Oct 2026 12:00:00 GMT1.3 PFLOPS peak vector system in service from 2015 to 2021.https://computeatlas.net/supercomputers/systems/earth-simulator-42026-10-02/system/earth-simulator-4/Added Earth Simulator 4, JAMSTEC's SX-Aurora TSUBASA hybrid system, 39th on the June 2021 TOP500Fri, 02 Oct 2026 12:00:00 GMT684 vector nodes plus EPYC CPU nodes and A100 GPU nodes, 19.5 PFLOPS total peak.https://computeatlas.net/supercomputers/systems/shoubu2026-10-02/system/shoubu/Added Shoubu, RIKEN's PEZY-SC immersion-cooled system, 136th on the November 2015 TOP500Fri, 02 Oct 2026 12:00:00 GMTExaScaler-1.4 system that topped the Green500 for three consecutive lists.https://computeatlas.net/supercomputers/systems/shoubu-system-b2026-10-02/system/shoubu-system-b/Added Shoubu System B, RIKEN's PEZY-SC2 ZettaScaler-2.2, 375th on the November 2018 TOP500Fri, 02 Oct 2026 12:00:00 GMTGreen500 number one in November 2017 with Xeon D-1571 hosts on InfiniBand EDR.https://computeatlas.net/supercomputers/systems/mn-22026-10-02/system/mn-2/Added MN-2, Preferred Networks' 1,024-GPU V100 cluster in YokohamaFri, 02 Oct 2026 12:00:00 GMTFirst GPU cluster built and managed solely by PFN, operating from July 2019.https://computeatlas.net/supercomputers/systems/nagoya-fx1002026-10-02/system/nagoya-fx100/Added Nagoya University's Fujitsu PRIMEHPC FX100Fri, 02 Oct 2026 12:00:00 GMT92,160-core SPARC64 XIfx system, 22nd on the November 2015 TOP500, replaced by Flow in 2020.https://computeatlas.net/supercomputers/systems/aterui-ii2026-10-02/system/aterui-ii/Added ATERUI II, NAOJ's astrophysics Cray XC50Fri, 02 Oct 2026 12:00:00 GMT2.09 PFlop/s Rmax, 117th on the June 2019 TOP500.https://computeatlas.net/supercomputers/systems/tsubame-12026-10-02/system/tsubame-1/Added TSUBAME1.0, Tokyo Tech's 2006 Sun Opteron clusterFri, 02 Oct 2026 12:00:00 GMT38.18 TFLOPS Rmax, seventh on the June 2006 TOP500.https://computeatlas.net/supercomputers/systems/hokusai-greatwave2026-10-02/system/hokusai-greatwave/Marked HOKUSAI GreatWave decommissionedFri, 02 Oct 2026 12:00:00 GMTRetired 2020-03: RIKEN HOKUSAI page lists HOKUSAI GreatWave (HGW) as April 2015 - March 2020 (decommissioned).https://computeatlas.net/supercomputers/systems/abci2026-10-02/system/abci/Marked ABCI decommissionedFri, 02 Oct 2026 12:00:00 GMTRetired 2024-10-31: ABCI operation page: as of Oct 31, 2024 ABCI 2.0 (upgrade of ABCI 1.0) has stopped completely; compute nodes retired. ABCI 3.0 is separate.https://computeatlas.net/supercomputers/systems/oakleaf-fx2026-10-02/system/oakleaf-fx/Marked Oakleaf-FX decommissionedFri, 02 Oct 2026 12:00:00 GMTRetired 2018-03-30: UTokyo ITC page: FX10 system (Oakleaf-FX and Oakbridge-FX) ended service on March 30, 2018 at 9:00 (Japanese text).https://computeatlas.net/supercomputers/systems/ito-subsystem-a2026-10-02/system/ito-subsystem-a/Marked ITO Subsystem A decommissionedFri, 02 Oct 2026 12:00:00 GMTRetired 2024-02-29: Kyushu RIIT notice: ITO service ends 2024-02-29 17:00; next system operation planned from July 2024 (Japanese text).https://computeatlas.net/supercomputers/systems/ha-pacs2026-10-02/system/ha-pacs/Added HA-PACS, Tsukuba's GPU clusterFri, 02 Oct 2026 12:00:00 GMT268 nodes with four NVIDIA M2090 GPUs each, 41st on the June 2012 TOP500.https://computeatlas.net/supercomputers/systems/utokyo-sr8000-1282026-10-02/system/utokyo-sr8000-128/Added the University of Tokyo's Hitachi SR8000/128, fifth on the November 1999 TOP500Fri, 02 Oct 2026 12:00:00 GMT128 nodes and 1,024 GFlop/s peak, in service 1999 to 2005.https://computeatlas.net/supercomputers/systems/jaxa-jss-fx12026-10-02/system/jaxa-jss-fx1/Added JAXA's first JSS Fujitsu FX1Fri, 02 Oct 2026 12:00:00 GMTSPARC64 VII FX1 with 12,032 cores, 110.6 TFlop/s Rmax; 60th on the November 2010 TOP500.https://computeatlas.net/supercomputers/systems/nifs-plasma-simulator-fx1002026-10-02/system/nifs-plasma-simulator-fx100/Added NIFS's fifth-generation Plasma Simulator FX100Fri, 02 Oct 2026 12:00:00 GMTFujitsu PRIMEHPC FX100, 2.376 PFlop/s Rmax; 49th on the November 2016 TOP500.https://computeatlas.net/supercomputers/systems/camphor-22026-10-02/system/camphor-2/Added Kyoto University's Camphor 2 Cray XC40Fri, 02 Oct 2026 12:00:00 GMT1,800 Xeon Phi 7250 nodes, 3.06 PFlop/s Rmax; 34th on the November 2016 TOP500.https://computeatlas.net/supercomputers/systems/jfrs-12026-10-02/system/jfrs-1/Added JFRS-1, QST RokkashoFri, 02 Oct 2026 12:00:00 GMTCray XC50 Xeon Gold 6148 fusion simulator, 209th on the June 2022 TOP500.https://computeatlas.net/supercomputers/systems/ims-molecular-simulator2026-10-02/system/ims-molecular-simulator/Added IMS Molecular SimulatorFri, 02 Oct 2026 12:00:00 GMTNEC LX Xeon Gold cluster on Omni-Path at the Institute for Molecular Science, 261st on the June 2020 TOP500.https://computeatlas.net/supercomputers/systems/nims-materials-simulator2026-10-02/system/nims-materials-simulator/Added NIMS Materials SimulatorFri, 02 Oct 2026 12:00:00 GMTHPE SGI 8600 Xeon Platinum 8268 cluster on Omni-Path, 234th on the June 2023 TOP500.https://computeatlas.net/supercomputers/systems/gmo-gpu-cloud2026-10-02/system/gmo-gpu-cloud/Added GMO GPU Cloud, a Japanese H200 cloudFri, 02 Oct 2026 12:00:00 GMT256-GPU NVIDIA H200 configuration on Spectrum-X Ethernet, 34th on the June 2025 Green500 at 53.81 GFlops/Watt.https://computeatlas.net/supercomputers/systems/a64fx-prototype2026-10-02/system/a64fx-prototype/Added the A64FX Prototype of FugakuFri, 02 Oct 2026 12:00:00 GMT768 Fujitsu A64FX CPUs at Fujitsu's Numazu Plant, first on the November 2019 Green500 at 16.876 GFlops/Watt and 6th in November 2020.https://computeatlas.net/supercomputers/systems/mdx-i2026-10-02/system/mdx-i/mdx I added (University of Tokyo data-science cloud used to train LLM-jp, 320 A100)Fri, 02 Oct 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/toyota-crdl-sx4-202026-10-02/system/toyota-crdl-sx4-20/Added Toyota Central R&D Labs' NEC SX-4/20Fri, 02 Oct 2026 12:00:00 GMT20-processor vector system, 27th on the June 1996 TOP500.https://computeatlas.net/supercomputers/systems/nifs-raijin2026-10-01/system/nifs-raijin/Added Raijin (NIFS)Thu, 01 Oct 2026 12:00:00 GMTNEC SX-Aurora TSUBASA Plasma Simulator with 4,320 vector engines at Japan's National Institute for Fusion Science, operated 2020 to 2025, TOP500 Rmax 7.89 PFlop/s. New company added, reported confidence.https://computeatlas.net/supercomputers/systems/tokyo-12026-10-01/system/tokyo-1/Added Tokyo-1 (Xeureka, Japan)Thu, 01 Oct 2026 12:00:00 GMTJapan's pharma-industry generative-AI supercomputer, 16 NVIDIA DGX H100 systems (128 H100 GPUs) run by Mitsui subsidiary Xeureka for Astellas, Daiichi Sankyo, Ono and others. New company Xeureka added, reported confidence.https://computeatlas.net/supercomputers/systems/helios-iferc2026-10-01/system/helios-iferc/Added Helios (IFERC)Thu, 01 Oct 2026 12:00:00 GMTThe Bull bullx fusion-research supercomputer at Rokkasho, Japan, 70,560 cores and 1.24 PFlop/s Rmax, in service 2012 to 2016. New company IFERC-CSC and site added, reported confidence.https://computeatlas.net/supercomputers/systems/nifs-plasma-simulator-sosei2026-10-01/system/nifs-plasma-simulator-sosei/Added Plasma Simulator Sosei (NIFS)Thu, 01 Oct 2026 12:00:00 GMTThe 40.4 PFlop/s NEC system of Xeon 6980P and AMD MI300A nodes at QST Rokkasho, operating since July 2025. New site added, verified confidence.https://computeatlas.net/supercomputers/systems/jma-primehpc-fx10002026-09-24/system/jma-primehpc-fx1000/Added with a rank pointer on the edition where it ranked highestThu, 24 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/mn-32026-09-24/system/mn-3/MN-3 added (Preferred Networks, Japan)Thu, 24 Sep 2026 12:00:00 GMTTopped Green500 four times in 2020-2021 on Preferred Networks' own MN-Core deep-learning ASIC, the only non-NVIDIA, non-AMD accelerator vendor in this dataset. Rank pointer recorded on the November 2021 edition, its best-documented number-one finish.https://computeatlas.net/supercomputers/systems/tsubame-kfc2026-09-24/system/tsubame-kfc/TSUBAME-KFC added (Tokyo Institute of Technology GSIC, Japan)Thu, 24 Sep 2026 12:00:00 GMTOil-immersion-cooled TSUBAME3.0 prototype; topped Green500 in November 2013 and June 2014, the first system to clear 4 GFlops/Watt. Rmax is derived from Tokyo Tech's published efficiency and power figures rather than a standalone Rmax disclosure; noted in notes_md.https://computeatlas.net/supercomputers/systems/gyoukou2026-09-24/system/gyoukou/Gyoukou addedThu, 24 Sep 2026 12:00:00 GMTExaScaler and PEZY Computing's Fluorinert-immersed ZettaScaler-2.2 system at JAMSTEC, 4th on the November 2017 TOP500 and 5th on that edition's Green500, decommissioned within months amid a subsidy-fraud scandal at PEZY Computing. Added with a rank pointer on its peak edition; sourced from TOP500 and corroborating reporting.https://computeatlas.net/supercomputers/systems/jaxa-toki-sora2026-09-24/system/jaxa-toki-sora/TOKI-SORA added, JAXA's A64FX-based JSS3 main computing system at ChofuThu, 24 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/tsubame-22026-09-23/system/tsubame-2/Added, TSUBAME3.0/4.0's predecessor, with a rank pointer on its highest editionWed, 23 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/oakleaf-fx2026-09-23/system/oakleaf-fx/Added, with a rank pointer on the edition where it ranked highestWed, 23 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/fugaku2026-09-22/system/fugaku/Gained a Green500 rank pointer (#54 on the 2023-11 list)Tue, 22 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/wisteria-bdec-012026-09-22/system/wisteria-bdec-01/Gained a Green500 rank pointer (#55 on the 2023-11 list)Tue, 22 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/tsubame-32026-09-22/system/tsubame-3/Gained a Green500 rank pointer (#59 on the 2023-11 list)Tue, 22 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/tsubame-42026-09-22/system/tsubame-4/Gained a Green500 rank pointer (#25 on the 2024-06 list)Tue, 22 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/aoba-s2026-09-22/system/aoba-s/Gained a Green500 rank pointer (#75 on the 2024-06 list)Tue, 22 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/miyabi2026-09-22/system/miyabi/Gained a Green500 rank pointer (#33 on the 2024-11 list)Tue, 22 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/abci-q2026-09-22/system/abci-q/Gained a Green500 rank pointer (#64 on the 2025-06 list)Tue, 22 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/abci-32026-09-22/system/abci-3/Gained a Green500 rank pointer (#65 on the 2025-06 list)Tue, 22 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/squid2026-09-22/system/squid/Gained a Green500 rank pointer (#159 on the 2025-06 list)Tue, 22 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/miyabi2026-09-20/system/miyabi/Added with a rank pointer on the edition where it ranked highestSun, 20 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/ohtaka2026-09-20/system/ohtaka/Added with a rank pointer on the edition where it ranked highestSun, 20 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/oakforest-pacs2026-09-20/system/oakforest-pacs/Added with a rank pointer on the edition where it ranked highestSun, 20 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/squid2026-09-20/system/squid/Added; TOP500 lists only its CPU partitionSun, 20 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/sakuraone2026-09-20/system/sakuraone/Added with a rank pointer on the edition where it ranked highestSun, 20 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/aoba-s2026-09-20/system/aoba-s/Added with a rank pointer on the edition where it ranked highestSun, 20 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/flow2026-09-20/system/flow/Added with a rank pointer on the edition where it ranked highestSun, 20 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/abci2026-09-19/system/abci/Raised to verified on an independent second sourceSat, 19 Sep 2026 12:00:00 GMThttps://computeatlas.net/supercomputers/systems/earth-simulator2026-09-19/system/earth-simulator/Raised to verified on an independent second sourceSat, 19 Sep 2026 12:00:00 GMT