Stadium: Center Court Round: 24 Ground: Hardcourt indoor
| Challenger Ningbo | 2019/10/14 05:55 | Shintaro Imai v Fajing Sun | 4-6,4-6 |
| ITF M25 Tay Ninh | 2019/10/08 03:45 | Naoki Nakagawa v Shintaro Imai | 6-2,6-1 |
| Challenger Kaohsiung | 2019/09/16 06:30 | Shintaro Imai v Renta Tokuda | 3-6,4-6 |
| Challenger Shanghai | 2019/09/09 06:25 | Arjun Kadhe v Shintaro Imai | 7-6,6-3 |
| Challenger Jinan | 2019/09/02 03:40 | Shintaro Imai v Chun Hsin Tseng | 5-7,6-4,2-6 |
| Challenger Yokkaichi | 2019/08/08 04:05 | Shintaro Imai v James Duckworth | 2-6,3-6 |
| Challenger Yokkaichi | 2019/08/06 02:50 | Nam Hoang Ly v Shintaro Imai | 6-2,2-6,3-6 |
| Challenger Yokkaichi | 2019/08/05 05:05 | Shintaro Imai v Naoki Tajima | 6-2,6-3 |
| ITF M15 Nanchang | 2019/10/02 02:00 | Kousuke Ogura v Seita Watanabe | 4-6,7-5,6-4 |
| ITF M15 Hua Hin | 2019/09/05 05:00 | Seita Watanabe v Takashi Saito | 4-6,4-6 |
| ITF M15 Hua Hin | 2019/09/04 03:00 | Arjun Kadhe v Seita Watanabe | 2-6,2-6 |
| ITF M15 Hua Hin | 2019/09/03 08:55 | Aaron Schmid v Seita Watanabe | 3-6,3-6 |
| ITF M15 Hua Hin | 2019/09/02 06:35 | Seita Watanabe v Cameron Green | 6-2,2-6,10-7 |
| ITF M15 Hua Hin | 2019/08/27 08:45 | Billy Harris v Seita Watanabe | 6-2,6-1 |
| ITF M15 Hua Hin | 2019/08/27 05:45 | Bingyu Yu v Seita Watanabe | 2-6,2-6 |
| ITF M15 Hua Hin | 2019/08/21 04:50 | Seong Chan Hong v Seita Watanabe | 6-1,6-2 |