Stadium: Court 2 Round: 28 Ground: Synthetic outdoor
| ITF Japan F8 | 2014/06/26 01:00 | Kikuchi, Gengo v Saito, Takashi | 7-6,2-6,7-6 |
| ITF Japan F7 | 2018/06/08 01:00 | Sora Fukuda v Saito, Takashi | 1-6,6-2,4-6 |
| ITF Japan F7 | 2018/06/07 02:00 | Kaito Uesugi v Saito, Takashi | 6-0,5-7,5-7 |
| ITF Japan F7 | 2018/06/05 03:35 | Onozawa, Arata v Saito, Takashi | 6-7,4-6 |
| ITF Vietnam F3 | 2018/05/16 06:00 | Saito, Takashi v Song, Min-Kyu | 6-1,6-0 |
| ITF Vietnam F3 | 2018/05/14 03:00 | Saito, Takashi v Romios, Matthew Christopher | 7-6,6-1 |
| ITF Vietnam F2 | 2018/05/11 03:00 | Rio Noguchi v Saito, Takashi | 4-6,7-5,6-3 |
| ITF Vietnam F2 | 2018/05/09 03:00 | Wong, Chun Hun v Saito, Takashi | 7-6,1-6,5-7 |
| ITF Vietnam F2 | 2018/05/07 03:00 | Saito, Takashi v Moritani, Soichiro | 7-6,3-6,6-3 |
| ITF Japan F7 | 2018/06/08 01:00 | Sho Shimabukuro v Kikuchi, Gengo | 4-6,4-6 |
| ITF Japan F7 | 2018/06/07 02:00 | Kikuchi, Gengo v Tashiro, Yuga | 6-2,6-2 |
| ITF Japan F7 | 2018/06/05 01:00 | Takuya Kumasaka v Kikuchi, Gengo | 6-3,3-6,4-6 |
| ITF Vietnam F3 | 2018/05/16 03:00 | Yu, Cheng-Yu v Kikuchi, Gengo | 6-3,6-1 |
| ITF Vietnam F3 | 2018/05/15 05:45 | Nguyen, Phuong van v Kikuchi, Gengo | 4-6,2-6 |
| ITF Vietnam F3 | 2018/05/13 04:00 | Kikuchi, Gengo v Thanapet Chanta | 7-6,6-4 |
| ITF Vietnam F2 | 2018/05/12 04:45 | Kikuchi, Gengo v Nam, Ji Sung | 4-6,3-6 |
| ITF Vietnam F2 | 2018/05/11 03:00 | Kikuchi, Gengo v Tanuma, Ryota | 6-4,6-2 |