Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| Challenger Kobe Qual | 2017/11/04 06:30 | Issei Okamura v Takuto Niki | 6-3,2-6,2-6 |
| ITF M25 - Sapporo | 2022/09/08 00:55 | Takuto Niki v Yuki Mochizuki | 2-6,6-7 |
| ITF M25 - Sapporo | 2022/09/07 02:50 | Kazuma Kawachi v Takuto Niki | 6-3,1-6,1-6 |
| ITF M25 - Sapporo | 2022/09/01 07:52 | Yamato Sueoka v Takuto Niki | 6-3,7-5 |
| ITF M25 - Sapporo | 2022/09/01 01:00 | Takuto Niki v Rimpei Kawakami | 6-3,1-6,7-5 |
| ITF M15 - Changwon | 2022/08/24 09:05 | Takuto Niki v Yuta Kawahashi | 2-6,1-6 |
| ITF M15 - Anseong | 2022/08/19 00:55 | Sora Fukuda v Takuto Niki | 6-4,6-2 |
| ITF M15 - Anseong | 2022/08/18 03:25 | Seon Yong Han v Takuto Niki | 6-4,3-6,2-6 |
| ITF M15 - Anseong | 2022/08/17 02:10 | Jangjun Kim v Takuto Niki | 5-7,2-6 |
| ITF M25 - Sapporo | 2022/09/07 05:15 | Tatsuma Ito v Issei Okamura | 6-1,6-2 |
| ITF M25 - Sapporo | 2022/09/05 04:00 | Issei Okamura v Taiki Nagamine | 6-1,6-3 |
| ITF M15 - Daegu | 2022/08/31 08:10 | Duckhee Lee v Issei Okamura | 5-7,6-1,6-3 |
| ITF M15 - Changwon | 2022/08/26 00:55 | Ajeet Rai v Issei Okamura | 6-1,6-7,6-3 |
| ITF M15 - Changwon | 2022/08/25 03:05 | Issei Okamura v Duckhee Lee | 6-2,3-6,7-5 |
| ITF M15 - Changwon | 2022/08/23 01:00 | Issei Okamura v Min Seong Kim | 6-4,6-0 |
| ITF M15 - Jakarta | 2022/08/15 04:45 | Issei Okamura v Amor Jasika | 3-6,4-6 |
| ITF M15 - Jakarta - Kval | 2022/08/14 03:55 | Issei Okamura v Roy Hobbs | 6-4,6-4 |