Stadium: Court 10 Round: 54 Ground: Hardcourt outdoor
| ITF M15 Daegu | 2019/06/05 01:00 | Ken Onishi v Oh-Hee Kwon | 2-6,2-6 |
| ITF M15 Daegu | 2019/06/03 02:40 | Ken Onishi v Sin Woo Lee | 6-1,6-7,10-1 |
| ITF M15 Tabarka | 2019/05/15 12:40 | Ken Onishi v Nicolas Bianchi | 6-4,1-6,4-6 |
| ITF M15 Tabarka | 2019/05/09 08:30 | Ken Onishi v Mathieu Perchicot | 0-6,0-6 |
| ITF M15 Tabarka | 2019/05/08 09:40 | Kazuma Kawachi v Ken Onishi | 7-6,5-7,0-6 |
| ITF M15 Tabarka | 2019/05/01 11:10 | Florian Lakat v Ken Onishi | 6-3,4-6,6-0 |
| ITF M15 Tabarka | 2019/04/29 08:00 | Mason Recci v Ken Onishi | 4-6,1-6 |
| ITF M25 Matsuyama | 2019/04/09 02:50 | Gage Brymer v Ken Onishi | 7-6,6-2 |
| ITF M15 Gimcheon | 2019/06/10 02:20 | Kangjae Kim v Seung-Hun Shin | 3-6,3-6 |
| ITF M15 Daegu | 2019/06/04 02:20 | Seita Watanabe v Seung-Hun Shin | 6-0,6-1 |
| ITF M15 Daegu | 2019/06/03 04:50 | Ho-Min Kang v Seung-Hun Shin | 3-6,6-4,6-10 |
| ITF Thailand F5 | 2018/10/01 02:30 | David Agung Susanto v Seung-Hun Shin | 6-2,6-4 |
| ITF Thailand F5 | 2018/09/30 02:30 | Seung-Hun Shin v Natthasith Kunsuwan | 7-6,6-1 |
| ITF Thailand F5 | 2018/09/29 02:30 | Pasawee Reansuwong v Seung-Hun Shin | 2-6,1-6 |
| ITF Thailand F4 | 2018/09/24 02:30 | Palaphoom Kovapitukted v Seung-Hun Shin | 6-3,6-4 |
| ITF Thailand F4 | 2018/09/23 04:00 | Seung-Hun Shin v Chanchai Sookton-Eng | 6-3,6-3 |