Stadium: Court 7 Round: 54 Ground: Synthetic outdoor
| ITF M15 Guam | 2019/06/05 04:00 | Masayoshi Ono v Jake Delaney | 6-3,2-6,2-6 |
| ITF M15 Karuizawa | 2019/05/29 01:00 | Shunrou Takeshima v Masayoshi Ono | 6-3,6-0 |
| ITF M25 Matsuyama | 2019/04/08 01:00 | Shota Iino v Masayoshi Ono | 7-6,6-0 |
| ITF M15 Kashiwa | 2019/04/01 00:00 | Masayoshi Ono v Bart Stevens | 3-6,2-6 |
| ITF M15 Mornington | 2019/03/25 23:00 | Jesse Delaney v Masayoshi Ono | 6-2,3-6,10-8 |
| ITF M15 Mornington | 2019/03/24 23:00 | Tom Evans v Masayoshi Ono | 0-6,5-7 |
| ITF M15 Mornington | 2019/03/17 23:00 | Stefan Skadarka v Masayoshi Ono | 7-6,7-5 |
| ITF M15 Nishi-Tama | 2019/03/05 01:00 | Sho Katayama v Masayoshi Ono | 6-4,6-4 |
| ITF M15 Guam | 2019/06/08 00:00 | Ko Suzuki v Hiroyasu Ehara | 4-6,1-6 |
| ITF M15 Guam | 2019/06/07 00:00 | Soichiro Moritani v Ko Suzuki | 3-6,4-6 |
| ITF M15 Guam | 2019/06/06 01:20 | Ko Suzuki v Karunuday Singh | 3-6,7-6,6-3 |
| ITF M15 Guam | 2019/06/05 02:40 | Ko Suzuki v Joseph W. Van Meter | 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 Soichiro Moritani | 6-4,6-2 |
| ITF M15 Karuizawa | 2019/05/31 01:00 | Ko Suzuki v Goran Markovic | 6-1,6-4 |
| ITF M15 Karuizawa | 2019/05/30 06:00 | Jordi Samper-Montana v Ko Suzuki | 4-6,6-0,6-7 |