| ITF - Japan F6 - Qualifikation | 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 - Türkei F10 | 2018/03/10 08:30 | Boris Butulija v Yuichiro Inui | 2-6,6-4,6-0 |
| ITF - Türkei F9 | 2018/03/04 07:00 | Dragos Nicolae Madaras v Yuichiro Inui | 6-1,6-1 |
| ITF - Türkei F8 | 2018/02/25 07:30 | Kenneth Raisma v Yuichiro Inui | 7-6,6-1 |
| ITF - Türkei F7 | 2018/02/17 11:00 | Yuichiro Inui v Lukas Krainer | 2-6,1-6 |
| ITF - Türkei F6 | 2018/02/10 09:00 | Yuichiro Inui v Felipe Meligeni Rodrigues Alves | 4-6,4-6 |
| ITF - Türkei F5 | 2018/02/05 07:30 | Ji Sung Nam v Yuichiro Inui | 7-5,6-0 |