Ground: Hardcourt outdoor
| ITF Thailand F9 | 2015/06/16 05:00 | Zach Itzstein v Ken Onishi | 6-4,2-6,0-6 |
| ITF China F6 | 2015/06/04 02:00 | Ken Onishi v Marcos Giraldi Requena | 4-6,4-6 |
| ITF China F6 | 2015/06/02 06:00 | Ken Onishi v Aoxiong Wang | 7-6,6-4 |
| ITF China F6 | 2015/05/26 02:00 | Ken Onishi v Young Seok Kim | 3-6,5-7 |
| ITF China F6 Qual | 2015/05/24 02:00 | Ken Onishi v Aoran Wang | 6-4,6-4 |
| ITF Thailand F9 | 2015/04/28 05:15 | Christopher O'Connell v Ken Onishi | 7-6,6-2 |
| ITF Thailand F9 | 2015/04/26 06:00 | Chayanon Kaewsuto v Ken Onishi | 6-4,1-6,2-6 |
| ITF Japan F2 | 2015/03/15 01:00 | Ryota Tanuma v Ken Onishi | 2-6,6-4,3-6 |
| ITF Thailand F9 | 2015/06/16 08:10 | Punn Bodhidatta v Shuichi Sekiguchi | 2-6,1-6 |
| ITF Japan F6 | 2015/06/10 03:10 | Masaki Sasai v Shuichi Sekiguchi | 7-6,7-5 |
| ITF Indonesia F3 | 2015/04/15 03:00 | Shuichi Sekiguchi v Finn Tearney | 6-7,6-3,6-7 |
| ITF Indonesia F2 | 2015/04/11 04:00 | Finn Tearney v Shuichi Sekiguchi | 0-6,1-6 |
| ITF Indonesia F2 | 2015/04/10 06:30 | Jeson Patrombon v Shuichi Sekiguchi | 2-6,0-6 |
| ITF Indonesia F2 | 2015/04/08 07:40 | Aaron Cortes Alcaraz v Shuichi Sekiguchi | 2-6,2-6 |
| ITF Japan F4 | 2015/04/02 01:00 | Zhe Li v Shuichi Sekiguchi | 6-4,2-6,6-2 |
| ITF Japan F4 | 2015/04/01 01:00 | Ryotaro Matsumura v Shuichi Sekiguchi | 2-6,4-6 |