Stadium: Court 2 Round: 54 Ground: Synthetic outdoor
| ITF Singapore F2 | 2018/05/19 03:00 | Yuichiro Inui v Skyler Butts | 6-2,6-7,1-6 |
| ITF Singapore F1 | 2018/05/15 05:15 | Shunrou Takeshima v Yuichiro Inui | 6-4,6-4 |
| ITF Singapore F1 | 2018/05/13 06:00 | Yuichiro Inui v Bang Shuo Yin | 7-5,6-1 |
| ITF Vietnam F2 | 2018/05/05 03:00 | Gengo Kikuchi v Yuichiro Inui | 6-4,6-4 |
| ITF Vietnam F1 | 2018/04/29 05:30 | Darren Polkinghorne v Yuichiro Inui | 6-3,6-3 |
| ITF Japan F6 Qual | 2018/04/07 01:00 | David Barclay v Yuichiro Inui | 1-6,7-6,6-4 |
| ITF Japan F5 | 2018/03/31 00:30 | Yuichiro Inui v Shao-Fan Liu | 0-6,4-6 |
| ITF Turkey F10 | 2018/03/10 08:30 | Boris Butulija v Yuichiro Inui | 2-6,6-4,6-0 |
| ITF Czech Republic F1 | 2018/05/12 09:00 | Adam Blecha v Masayoshi Ono | 6-3,6-2 |
| ITF Sweden F1 Qual | 2018/05/05 08:00 | Masayoshi Ono v Simon Yitbarek | 2-6,6-4,4-6 |
| ITF Japan F6 Qual | 2018/04/09 02:45 | Aoran Wang v Masayoshi Ono | 3-6,6-2,6-2 |
| ITF Japan F6 Qual | 2018/04/08 04:00 | Masayoshi Ono v Ken Onoda | 6-2,6-4 |
| 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 |