Seiko Okamoto advanced when Chisayo Ito retired 5-4 in the Haibara 10K qualifying round. Seiko Okamoto extended the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-05-20 | Tianjin 25K | R16 | hard | Seiko Okamoto | 6-4 7-5 |
| 2000-08-28 | Kugayama 10K | R32 | hard | Seiko Okamoto | 2-6 6-4 6-4 |
| 1999-11-22 | Kofu 10K | R32 | carpet | Chisayo Ito | 6-7 6-3 7-6 |
| 1999-09-06 | Ibaraki 3 10K | R16 | hard | Chisayo Ito | 6-1 4-6 6-3 |