Stadium: Court 8 Round: 62 Ground: Clay
| ITF Greece F4 | 2018/03/18 09:30 | Maksim Tikhomirov v Masayoshi Ono | 7-6,6-2 |
| ITF Greece F4 | 2018/03/17 07:30 | Masayoshi Ono v Leevi Saatela | 6-1,6-0 |
| ITF Greece F3 | 2018/03/10 10:00 | Masayoshi Ono v Diego Matos | 5-7,4-6 |
| ITF Greece F1 | 2018/02/25 09:00 | Diego Matos v Masayoshi Ono | 3-6,7-6,6-4 |
| ITF Turkey F4 | 2018/01/29 08:00 | Nikita Mashtakov v Masayoshi Ono | 6-4,6-0 |
| ITF Turkey F4 | 2018/01/28 07:30 | Masayoshi Ono v Nenad Vladusic | 1-6,6-2,6-3 |
| ITF Turkey F4 | 2018/01/27 07:30 | Masayoshi Ono v Bulut Ozcelik | 6-1,6-2 |
| ITF Turkey F3 | 2018/01/20 07:00 | Masayoshi Ono v Nikita Mashtakov | 7-6,3-6,4-6 |
| 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 Greece F3 | 2018/03/10 07:30 | Federico Moreno v Ken Onoda | 6-3,6-4 |
| ITF Greece F2 | 2018/03/04 08:00 | Duje Ajdukovic v Ken Onoda | 7-5,7-6 |
| ITF Greece F2 | 2018/03/03 07:30 | Ken Onoda v Andreas A Lavdas | 6-1,6-2 |
| ITF Turkey F8 | 2018/02/27 07:30 | Felipe Meligeni Rodrigues Alves v Ken Onoda | 6-4,6-2 |
| ITF Turkey F8 | 2018/02/25 07:30 | Ran Amar v Ken Onoda | 3-6,5-7 |
| ITF Turkey F8 | 2018/02/24 09:30 | Ruben Busch v Ken Onoda | 2-6,2-6 |