KDDI GPU Cloud

Also known as KDDI Osaka Sakai GB200 NVL72

Operated by KDDI at KDDI Osaka Sakai Data Center .

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: 22.21 PFlop/s
Rpeak: 24.12 PFlop/s
Rmax ÷ Rpeak: 92.1%
Cores: 148,896
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	- NVIDIA DGX GB200 NVL72 (manufacturer listed as HPE)	Hewlett Packard Enterprise HPENYSE	-	Reported	top500.org
Accelerator	NVIDIA GB200 NVL72 Accelerators Arm CPU + CUDA GPU · TSMC 4NP NVIDIA GB200 NVL72	NVIDIA NVDANASDAQ	-	Verified	top500.org newsroom.kddi.com
CPU	NVIDIA Grace CPUs Armv9 (Neoverse V2) · 72C · 3.1 GHz · TSMC 4N NVIDIA Grace 72C 3.1GHz	NVIDIA NVDANASDAQ	-	Reported	top500.org
Interconnect	- NVIDIA Spectrum-X Ethernet	NVIDIA NVDANASDAQ	-	Reported	top500.org
Operating system	Ubuntu Server Operating systems Linux distribution · Open source, free with paid support tiers Ubuntu 24.04.1 LTS	Canonical	-	Reported	top500.org

Compute deals

2025-06-25: KDDI and Hewlett Packard Enterprise (chip supply ). telecomtv.com newsroom.kddi.com

All compute deals. Headline values are as announced, not additive.

The read

KDDI's GPU cloud service on NVIDIA GB200 NVL72 servers at its Osaka Sakai Data Center, the former Sharp Sakai plant KDDI acquired in April 2025. KDDI's newsroom release of 22 January 2026 states trial operations began that day, applications opened from 1 April 2026, and the four-storey, roughly 57,000 square metre building uses direct liquid cooling plus air cooling and renewable power; it does not give a GPU count. TOP500 lists the system as an NVIDIA DGX GB200 NVL72 (manufacturer HPE) with NVIDIA Grace 72C 3.1GHz CPUs, Spectrum-X Ethernet and Ubuntu 24.04.1, 148,896 cores, Rmax 22.21 PFlop/s and Rpeak 24.12 PFlop/s at rank 98 on the June 2026 list. The TOP500 June 2026 edition is full in this dataset, so no list appearance is recorded and ranked stays 0.

Timeline

2026-01 First operational source

Site & facility

KDDI Osaka Sakai Data Center

Location: Sakai, Osaka, Japan
Cooling: Direct liquid cooling plus air cooling
Commissioned: 2026

newsroom.kddi.com

Change history

2026-10-04 Added KDDI GPU Cloud, GB200 NVL72 at the Osaka Sakai Data Center

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.

Cited source	Result	Found on the page
newsroom.kddi.com	names system and part	NVIDIA GB200 NVL72
top500.org	names system and part	NVIDIA GB200 NVL72, NVIDIA Grace, Ubuntu Server

Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.