Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF Guam F1 | 2018/06/17 00:00 | Masayoshi Ono v Nicholas Kamisar | 6-4,6-4 |
| ITF Guam F1 | 2018/06/16 01:00 | Camden Camacho v Masayoshi Ono | 0-6,1-6 |
| ITF Japan F8 | 2018/06/12 01:00 | Masayoshi Ono v Kazuma Kawachi | 4-6,0-6 |
| ITF Japan F8 | 2018/06/11 00:00 | Masayoshi Ono v Yutaro Matsuzaki | 6-2,6-2 |
| ITF Japan F8 | 2018/06/09 04:45 | Masaki Sasai v Masayoshi Ono | 5-7,4-6 |
| ITF Japan F8 | 2018/06/09 01:00 | Yasunori Hashikawa v Masayoshi Ono | 6-2,4-6,4-6 |
| ITF Japan F7 Qual | 2018/06/03 01:00 | Yuichiro Inui v Masayoshi Ono | 7-5,6-2 |
| ITF Czech Republic F1 | 2018/05/12 09:00 | Adam Blecha v Masayoshi Ono | 6-3,6-2 |