| 4mm[-4mm] TOP20 Supercomputers - Japan | ||||||
| N | Manufacturer | Installation Site | Field of | # | 
| 
|
| local | Computer | Location/Year | Application | Proc. | 
| 
|
| world | [Mflop/s] | |||||
| 1 | Fujitsu | NAL | Research | 140 | 170400 | 42000 |
| 1 | Numerical Wind Tunnel | Japan /1993 | Aerospace | 236000 | 13800 | |
| 2 | Fujitsu | National Lab. for High Energy Physics | Research | 80 | 98900 | 32640 |
| 5 | VPP500/80 | Japan /1994 | 128000 | 10050 | ||
| 3 | NEC | NEC | Vendor | 32 | 60720 | . |
| 9 | SX-4/32 | Tokyo Japan /1995 | Benchmarking | 64000 | . | |
| 4 | Fujitsu | Japan Atomic Energy Research | Research | 42 | 54500 | . |
| 11 | VPP500/42 | Japan /1994 | 67200 | . | ||
|
5 | Fujitsu | Nagoya University | Academic | 42 | 54500 | . |
| 12 | VPP500/42 | Nagoya Japan /1995 | 67200 | . | ||
| 6 | Fujitsu | National Genetics Research Lab. | Research | 40 | 52070 | . |
| 14 | VPP500/40 | Japan /1995 | 64000 | . | ||
|
7 | Fujitsu | Tokyo University - Inst. of Solid State Physics | Academic | 40 | 52070 | . |
| 15 | VPP500/40 | Tokyo Japan /1994 | 64000 | . | ||
| 8 | Fujitsu | The Angstrom Technology Partnership | Research | 32 | 42400 | 20736 |
| 19 | VPP500/32 | Tsukuba Japan /1993 | 51200 | 4940 | ||
| 9 | Fujitsu | Tsukuba University | Research | 30 | 39812 | . |
| 20 | VPP500/30 | Tsukuba Japan /1993 | 48000 | . | ||
| 10 | Fujitsu | Institute of Physical and Chemical Res. (RIKEN) | Research | 28 | 37225 | . |
| 21 | VPP500/28 | Tokyo Japan /1993 | 44800 | . | ||
| 11 | Hitachi | Hitachi Ltd. GPCD | Vendor | 4 | 28400 | 15500 |
| 27 | S-3800/480 | Japan /1994 | Software | 32000 | 830 | |
|
12 | Hitachi | Meteorological Agency | Research | 4 | 28400 | 15500 |
| 28 | S-3800/480 | Japan /1995 | Weather | 32000 | 830 | |
|
13 | Hitachi | University of Tokyo | Academic | 4 | 28400 | 15500 |
| 29 | S-3800/480 | Tokyo Japan /1993 | 32000 | 830 | ||
| 14 | NEC | NEC | Vendor | 4 | 23200 | 6400 |
| 40 | SX-3/44R | Tokyo Japan /1990 | 26000 | 830 | ||
|
15 | NEC | Tohoku University | Academic | 4 | 23200 | 6400 |
| 41 | SX-3/44R | Tohoku Japan /1993 | 26000 | 830 | ||
| 16 | Hitachi | Hokkaido University | Academic | 3 | 21600 | 15680 |
| 42 | S-3800/380 | Sapporo Japan /1994 | 24000 | 760 | ||
|
17 | Hitachi | Institute for Materials Research/Tohoku University | Academic | 3 | 21600 | 15680 |
| 43 | S-3800/380 | Japan /1994 | 24000 | 760 | ||
| 18 | Fujitsu | Kyoto University | Academic | 15 | 20360 | . |
| 44 | VPP500/15 | Kyoto Japan /1994 | 24000 | . | ||
| 19 | NEC | National Inst. for Molecular Science | Research | 3 | 17400 | 6144 |
| 49 | SX-3/34R | Okozaki Japan /1993 | 19500 | 691 | ||
| 20 | Cray | Res. Inf. Processing System (RIPS) | Research | 16 | 13700 | 10000 |
| 82 | Y-MP C916/16256 | Tsukuba Japan /1994 | 15238 | 650 | ||