Stadium: Court 1 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Sharm El Sheikh | 2021/01/31 17:30 | Miladinovic, Marko v Onishi, Ken | 7-5,6-2 |
| ITF M15 Cairo | 2021/01/27 12:15 | Aristotelis Thanos v Onishi, Ken | 6-3,7-6 |
| ITF M15 Cairo | 2021/01/26 07:55 | Dzhavakian, Yurii v Onishi, Ken | 4-6,1-6 |
| ITF M15 Cairo | 2021/01/25 08:00 | Onishi, Ken v Maikel De Boes | 6-4,3-6,18-16 |
| ITF M15 Cairo | 2021/01/24 11:30 | Onishi, Ken v Mathys Erhard | 6-4,6-4 |
| ITF M15 Cairo | 2021/01/17 10:00 | Roncalli, Simone v Onishi, Ken | 6-3,6-1 |
| ITF M15 Cairo | 2021/01/11 08:00 | Onishi, Ken v Simon Beaupain | 3-6,4-6 |
| ITF - M15 Sharm El Sheikh | 2020/02/24 10:00 | Asrawy, Amr v Onishi, Ken | 4-6,6-0,10-8 |
| ITF - M15 Sharm El Sheikh | 2021/01/31 10:30 | Issei Okamura v Taisei Ichikawa | 7-6,3-6,10-7 |
| ITF M15 Cairo | 2021/01/26 08:00 | Taisei Ichikawa v Keisuke Saitoh | 2-6,5-7 |
| ITF M15 Cairo | 2021/01/25 10:30 | Taisei Ichikawa v Hesham, Mohamed | 6-0,6-0 |
| ITF M15 Cairo | 2021/01/24 09:30 | Taisei Ichikawa v Maik Steiner | 6-4,6-4 |
| ITF M15 Cairo | 2021/01/17 08:00 | Kawakami, Rimpei v Taisei Ichikawa | 2-6,6-2,10-6 |
| ITF M15 Cairo | 2021/01/11 09:00 | Sunish, Dhruv v Taisei Ichikawa | 5-7,6-4,10-5 |
| Nonthaburi, Simples M-ITF-THA-06A | 2019/11/26 07:20 | Taisei Ichikawa v Nam, Ji Sung | 5-7,2-6 |
| Challenger Kobe | 2019/11/07 02:00 | Yosuke Watanuki v Taisei Ichikawa | 6-2,6-1 |