Stadium: Court 7 Round: 54 Ground: Synthetic outdoor
| Guam, Singles M-ITF-GUM-01A | 2019/06/05 04:00 | Ono, Masayoshi v Jake Delaney | 6-3,2-6,2-6 |
| ITF - M15 Karuizawa | 2019/05/29 01:00 | Takeshima, Shunrou v Ono, Masayoshi | 6-3,6-0 |
| Matsuyama, Singles M-ITF-JPN-06A | 2019/04/08 01:00 | Iino, Shota v Ono, Masayoshi | 7-6,6-0 |
| ITF - M15 Kashiwa | 2019/04/01 00:00 | Ono, Masayoshi v Stevens, Bart | 3-6,2-6 |
| Mornington, Singles Qualifying M-ITF-AUS-04A | 2019/03/25 23:00 | Jesse Delaney v Ono, Masayoshi | 6-2,3-6,10-8 |
| Mornington, Singles Qualifying M-ITF-AUS-04A | 2019/03/24 23:00 | Evans, Thomas v Ono, Masayoshi | 0-6,5-7 |
| Mornington, Singles Qualifying M-ITF-AUS-04A | 2019/03/17 23:00 | Skadarka, Stefan v Ono, Masayoshi | 7-6,7-5 |
| Nishi-Tama, Simples M-ITF-JPN-01A | 2019/03/05 01:00 | Katayama, Sho v Ono, Masayoshi | 6-4,6-4 |
| Guam, Singles M-ITF-GUM-01A | 2019/06/08 00:00 | Ko Suzuki v Ehara, Hiroyasu | 4-6,1-6 |
| Guam, Singles M-ITF-GUM-01A | 2019/06/07 00:00 | Moritani, Soichiro v Ko Suzuki | 3-6,4-6 |
| Guam, Singles M-ITF-GUM-01A | 2019/06/06 01:20 | Ko Suzuki v Singh, Karunuday | 3-6,7-6,6-3 |
| Guam, Singles M-ITF-GUM-01A | 2019/06/05 02:40 | Ko Suzuki v van Meter, Joseph W | 6-2,6-4 |
| ITF - M15 Karuizawa | 2019/06/02 02:00 | Ko Suzuki v Yuki Mochizuki | 4-6,6-4,2-6 |
| ITF - M15 Karuizawa | 2019/06/01 02:00 | Ko Suzuki v Moritani, Soichiro | 6-4,6-2 |
| ITF - M15 Karuizawa | 2019/05/31 01:00 | Ko Suzuki v Markovic, Goran | 6-1,6-4 |
| ITF - M15 Karuizawa | 2019/05/30 06:00 | Samper-Montana, Jordi v Ko Suzuki | 4-6,6-0,6-7 |