Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| ITF Singapore F3 | 2018/05/27 03:00 | Ken Onoda v Congsup Congcar | 4-6,4-6 |
| ITF Singapore F3 | 2018/05/26 03:00 | Ken Onoda v Kenneth Chua | 6-2,6-0 |
| ITF Singapore F2 | 2018/05/20 03:00 | Kazuki Nishiwaki v Ken Onoda | 6-1,6-2 |
| ITF Singapore F2 | 2018/05/19 02:00 | Jonathan-kyle Tan v Ken Onoda | 6-7,2-6 |
| ITF Singapore F1 | 2018/05/14 02:00 | Mousheg Hovhannisyan v Ken Onoda | 6-0,6-1 |
| ITF Japan F6 Qual | 2018/04/08 04:00 | Masayoshi Ono v Ken Onoda | 6-2,6-4 |
| ITF Japan F5 | 2018/04/01 00:30 | Ken Onoda v Masaki Sasai | 3-6,1-6 |
| ITF Japan F5 | 2018/03/31 00:30 | Takashi Saito v Ken Onoda | 3-6,4-6 |
| ITF Japan F8 | 2018/06/16 02:00 | Gengo Kikuchi v Sho Katayama | 6-4,7-5 |
| ITF Japan F8 | 2018/06/15 04:05 | Sho Katayama v Kaito Uesugi | 6-3,7-6 |
| ITF Japan F8 | 2018/06/14 02:50 | Sho Katayama v Keisuke Watanuki | 6-2,6-0 |
| ITF Japan F8 | 2018/06/12 01:00 | Sho Katayama v Haru Inoue | 6-1,6-4 |
| ITF China F8 | 2018/06/08 04:10 | Sho Katayama v Hiroyasu Ehara | 0-6,2-6 |
| ITF China F8 | 2018/06/06 02:00 | Sho Katayama v Bang Shuo Yin | 6-2,6-4 |
| ITF China F8 | 2018/06/04 03:50 | Sho Katayama v Hao Wu | 6-2,6-2 |
| ITF Japan F6 | 2018/04/11 01:00 | Sho Katayama v Zhe Li | 1-6,6-3,4-6 |