Shizu Katsumi defeated Shiho Tanaka 3-6 6-4 6-4 in the Hiroshima 10K qualifying round on grass. The result followed the form book — Shizu Katsumi came in leading the head-to-head 2–0. Shizu Katsumi extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-04-18 | Yamaguchi 10K | R32 | clay | Shizu Katsumi | 6-4 7-5 |
| 2003-10-20 | Tokyo 10K | R32 | hard | Shizu Katsumi | 6-3 6-1 |