Soichiro Moritani defeated Kento Takeuchi 6-3 6-3 in the M15 Karuizawa 1 quarter-final on clay. The result followed the form book — Soichiro Moritani came in leading the head-to-head 2–1. Soichiro Moritani extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-01-10 | M15 Anning 2 | R16 | clay | Soichiro Moritani | 2-6 6-3 7-5 |
| 2018-03-12 | Japan F2 | R16 | hard | Soichiro Moritani | 6-4 6-0 |
| 2015-10-12 | Philippines F2 | R16 | clay | Kento Takeuchi | 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.