Stadium: Court 7 Round: 25 Ground: Hardcourt outdoor
| ITF Hong Kong F3 | 2018/12/24 02:00 | Issei Okamura v Taisei Ichikawa | 6-2,7-5 |
| ITF M15 - Tsukuba | 2019/03/26 02:35 | Taisei Ichikawa v Yuta Shimizu | 6-4,3-6,2-6 |
| ITF M15 Kofu | 2019/03/20 03:25 | Taisei Ichikawa v Masamichi Imamura | 6-7,4-6 |
| ITF M15 - Nishi-Tokyo | 2019/03/12 02:40 | Taisei Ichikawa v Blake Ellis | 6-7,4-6 |
| ITF M15 Nishi-Tama | 2019/03/08 01:00 | Taisei Ichikawa v Tomohiro Masabayashi | 6-4,1-6,2-6 |
| ITF M15 Nishi-Tama | 2019/03/05 07:00 | Takuya Kumasaka v Taisei Ichikawa | 1-6,5-7 |
| ITF M15 Anning | 2019/01/10 03:00 | Taisei Ichikawa v Kazuki Nishiwaki | 5-7,3-6 |
| ITF M15 Anning | 2019/01/09 05:45 | Luca Castelnuovo v Taisei Ichikawa | 6-2,2-6,4-6 |
| ITF M15 Anning | 2019/01/03 02:00 | Ti Chen v Taisei Ichikawa | 6-2,3-6,6-3 |
| ITF M15 - Tsukuba | 2019/03/27 03:25 | Issei Okamura v Naoki Tajima | 3-6,4-6 |
| ITF M15 Kofu | 2019/03/22 02:00 | Issei Okamura v Ryota Tanuma | 4-6,2-6 |
| ITF M15 Kofu | 2019/03/21 02:00 | Takuya Kumasaka v Issei Okamura | 1-6,2-6 |
| ITF M15 Kofu | 2019/03/19 02:50 | Aoran Wang v Issei Okamura | 2-6,6-4,4-6 |
| ITF M15 - Nishi-Tokyo | 2019/03/13 05:25 | Rimpei Kawakami v Issei Okamura | 6-2,6-1 |
| ITF M15 - Nishi-Tokyo | 2019/03/12 01:00 | Issei Okamura v Hikaru Shiraishi | 6-2,6-3 |
| ITF M15 - Nishi-Tokyo | 2019/03/11 02:00 | Issei Okamura v Li-Wei Tan | 6-4,6-0 |
| ITF M25 - Mildura | 2019/03/07 02:00 | Issei Okamura v Shuichi Sekiguchi | 3-6,6-3,2-6 |