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Japan's oldest players during the 1991 season, and their age in years and days on the occasion of their final appearance, starting or coming on as a substitute.
For each player age is given in days, and in years and days, from their date of birth.
| Player | Age (Y:d) | Age (days) | Match |
|---|---|---|---|
| Shinichi Morishita | 30:155 | 11113 | 02 Jun 1991v Thailand |
| Tetsuji Hashiratani | 26:321 | 9818 | 02 Jun 1991v Thailand |
| Akihiro Nagashima | 26:112 | 9609 | 31 Jul 1990v Korea DPR |
| Takumi Horiike | 25:268 | 9400 | 02 Jun 1991v Thailand |
| Katsumi Oenoki | 25:116 | 9248 | 29 Jul 1990v China PR |
| Kenta Hasegawa | 25:5 | 9137 | 01 Oct 1990v Iran |
| Masahiro Fukuda | 24:157 | 8923 | 02 Jun 1991v Thailand |
| Tetsuya Asano | 24:99 | 8865 | 02 Jun 1991v Thailand |
| Masami Ihara | 23:257 | 8658 | 02 Jun 1991v Thailand |
| Tsuyoshi Kitazawa | 22:295 | 8331 | 02 Jun 1991v Thailand |
| Hisashi Kurosaki | 22:145 | 8181 | 01 Oct 1990v Iran |
| Fumitake Miura | 20:294 | 7599 | 02 Jun 1991v Thailand |