Estádio: Court 6 Round: 25 Ground: Hardcourt outdoor
| ITF - Guame F1 | 2018/06/19 00:00 | Kazuma Kawachi v Yuichiro Inui | 6-7,6-1,6-2 |
| ITF - M15 Jacarta | 2023/06/21 06:00 | Cihan Akay v Yuichiro Inui | 6-1,6-7,6-0 |
| ITF - M15 Jacarta | 2023/06/15 02:00 | Yuichiro Inui v Millen Hurrion | 1-6,3-6 |
| ITF - M15 Jacarta | 2023/06/14 02:00 | Timothy Phung v Yuichiro Inui | 6-4,3-6,1-6 |
| ITF - M25 Jacarta | 2023/06/08 02:00 | Hiroki Moriya v Yuichiro Inui | 6-2,6-2 |
| ITF - M25 Jacarta | 2023/06/07 02:00 | Yuichiro Inui v Anthony Susanto | 3-6,6-4,6-4 |
| ITF - M15 Karuizawa | 2023/06/03 03:30 | Yuichiro Inui v Sora Fukuda | 3-6,3-6 |
| ITF - M15 Karuizawa | 2023/06/01 02:25 | Yuichiro Inui v Lennon-Roark Jones | 6-3,6-2 |
| ITF - M15 Karuizawa | 2023/05/31 01:00 | Yuichiro Inui v Ren Nakamura | 6-1,3-6,6-4 |
| ITF - M15 Jacarta | 2023/06/22 02:00 | Koki Matsuda v Kazuma Kawachi | 7-6,4-6,6-2 |
| ITF - M15 Jacarta | 2023/06/20 07:20 | Kazuma Kawachi v Roy Hobbs | 6-2,6-1 |
| ITF - M15 Jacarta | 2023/06/17 02:00 | Kazuma Kawachi v Justin Barki | 4-6,4-6 |
| ITF - M15 Jacarta | 2023/06/15 02:00 | Kazuma Kawachi v Gunawan Trismuwantara | 6-1,6-2 |
| ITF - M15 Jacarta | 2023/06/14 02:00 | Kazuma Kawachi v Moerani Bouzige | 6-4,6-4 |
| ITF - M15 Karuizawa | 2023/06/03 03:30 | Kazuma Kawachi v Tatsuma Ito | 1-6,4-6 |
| ITF - M15 Karuizawa | 2023/06/01 00:30 | Kazuma Kawachi v Ko Suzuki | 6-2,1-6,7-5 |
| ITF - M15 Karuizawa | 2023/05/30 07:05 | Kazuma Kawachi v Ko Nagashima | 6-2,6-3 |