Supercomputers/Systems/UTokyo HITAC S-3800/480
Japan · decommissioned · hpc
UTokyo HITAC S-3800/480
Also known as Hitachi S-3800/480 at the University of Tokyo
Operated by University of Tokyo at University of Tokyo Computer Centre .
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
- 28.4 GFlop/s
- Rpeak
- 32.0 GFlop/s
- Rmax ÷ Rpeak
- 88.8%
- Cores
- 4
- 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 | - Hitachi built the HITAC S-3800/480 | Hitachi | - | Reported | cc.u-tokyo.ac.jptop500.org |
The read
The four-processor Hitachi HITAC S-3800/480 vector supercomputer at the University of Tokyo, the centre's vector machine after the S-820/80. The centre's past-systems page gives 1993 to 1999, 2 GB of main storage, 16 GB of extended storage and 32 GFlop/s peak. TOP500 lists 4 processors at 32 GFlop/s Rpeak, running VOS3/HAP/ES and OSF/1, from June 1993 (rank 36 at 5.71 GFlop/s) to November 1998 (rank 233), reaching rank 11 on the June 1994 list at 27.5 GFlop/s Rmax; its page later shows 28.4 GFlop/s (https://www.top500.org/system/168780/). TOP500 is the only source for Rmax, so the tier is reported.
Timeline
- 1993 First operational source
- 1994-06 List debut at #11 (June 1994) source
- 1999 Decommissioned source
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 UTokyo HITAC S-3800/480
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 |
|---|---|---|
| cc.u-tokyo.ac.jp | names system only | - |
| top500.org | names system only | - |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.