Stadium: 19 Round: 27 Ground: Hardcourt outdoor
| ITF Japan F6 Qual | 2015/06/08 01:00 | Yuichiro Inui v Issei Okamura | 3-6,1-6 |
| ITF M15 Nakhon Si Thammarat | 2024/07/01 02:00 | Issei Okamura v Gabor Hornung | 6-4,2-6,10-6 |
| ITF M25 Luzhou | 2024/06/19 09:55 | Sheng Tang v Issei Okamura | 6-3,7-5 |
| ITF M15 Hong Kong | 2024/06/12 09:30 | Ajeet Rai v Issei Okamura | 6-1,6-1 |
| ITF M15 Hong Kong | 2024/06/11 01:55 | Issei Okamura v Charlie Pade | 7-5,6-2 |
| ITF M15 Harmon | 2024/06/05 04:30 | Issei Okamura v Naoki Tajima | 6-3,3-6,3-6 |
| ITF M15 Karuizawa | 2024/05/27 01:00 | Issei Okamura v Yusuke Kusuhara | 3-6,6-3,2-10 |
| ITF M15 Karuizawa | 2024/05/26 01:00 | Issei Okamura v Antoine Voisin | 6-1,6-1 |
| ITF M25 Addis Ababa | 2024/05/21 08:05 | Issei Okamura v Kabir Hans | 4-6,1-6 |
| ITF M15 Tokyo | 2024/07/02 01:00 | Yuichiro Inui v Yuta Tomida | 2-6,6-2,10-6 |
| ITF M15 Tokyo | 2024/07/01 01:00 | Yuichiro Inui v Anthony Shumsky | 6-1,6-1 |
| ITF M15 Hong Kong | 2024/06/19 02:00 | Jeremy Zhang v Yuichiro Inui | 3-6,6-4,6-4 |
| ITF M15 Hong Kong | 2024/06/12 05:30 | Yuichiro Inui v William Jansen | 4-6,4-6 |
| ITF M15 Harmon | 2024/06/06 02:15 | Yuichiro Inui v Jake Delaney | 4-6,6-7 |
| ITF M15 Harmon | 2024/06/04 00:00 | Yusuke Kusuhara v Yuichiro Inui | 6-2,2-6,6-7 |
| ITF M15 Karuizawa | 2024/05/29 02:30 | Yuichiro Inui v Hikaru Shiraishi | 1-6,3-6 |
| ITF M15 Shymkent | 2024/04/24 08:45 | Kazuki Nishiwaki v Yuichiro Inui | 7-6,6-3 |