Supercomputers/Systems/Hokkaido SR16000
Japan · operational · hpc
Hokkaido SR16000
Also known as Hokkaido University Hitachi SR16000 Model M1; Interdisciplinary Large-scale Information Infrastructures supercomputer (2011)
Operated by IIC, Hokkaido University at Hokkaido University Sapporo Campus .
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: 1263 of 1345 systems have a readable citation that names them, and 56 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
- 121.60 TFlop/s
- Rpeak
- 168.91 TFlop/s
- Rmax ÷ Rpeak
- 72.0%
- Cores
- 5,632
- Power
- 354.6 kW
- Per watt
- 0.3 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 | - Hitachi SR16000 Model M1 | Hitachi | - | Reported | iic.hokudai.ac.jptop500.org |
| CPU | - IBM POWER7 8C 3.84GHz, 5,632 cores | IBM | - | Reported | top500.org |
| Operating system | IBM AIX Operating systems Unix (System V-derived) · Proprietary IBM AIX | IBM | - | Reported | top500.org |
The read
Hitachi SR16000 Model M1 supercomputer of Hokkaido University's Information Initiative Center. The center's history page records that in November 2011 it renewed its supercomputer and general-purpose systems as one interdisciplinary large-scale computer system, introducing the HITACHI SR16000 Model M1 together with a BladeSymphony BS2000 cloud system, external disks and a visualization system. TOP500 is the only source of the figures: 5,632 POWER7 8C 3.84 GHz cores, AIX, 121.6 TFlop/s Rmax, 168.91 TFlop/s Rpeak and 354.6 kW, 95th on the November 2011 list and last seen in November 2013. The center's December 2018 renewal (Grand Chariot, a Fujitsu PRIMERGY system) followed; no retirement date for the SR16000 was found, so status is held as of the last TOP500 appearance and the tier is reported because the center page confirms only the model and date.
Timeline
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Site & facility
Change history
- 2026-10-09 Added Hokkaido SR16000
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 |
|---|---|---|
| iic.hokudai.ac.jp | names system only | - |
| top500.org | names system only | - |
Checked 2026-10-13 by pnpm verify. Re-run it and the table changes with the web.
Further reading
Operating a supercomputer
Acceptance testing, why "installed" and "in production" are six months apart, and the machine lifecycle.
Inside a node
Latency-optimised versus throughput-optimised processors, NUMA, and the end of the host-to-device copy.
Programming a supercomputer
The software stack beneath the application, and why the OS is now a sovereignty signal as much as a technical choice.