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