Stadium: Indoor D1 輪: 62 Ground: Clay
| ITF日本F8 | 2018/06/09 01:00 | Yuto Sakai v 阿爾瓊 Mariyappa | 6-0,6-0 |
| ITF日本F6資格賽 | 2018/04/09 01:00 | 岡村一成 v Yuto Sakai | 6-2,6-3 |
| ITF日本F6資格賽 | 2018/04/08 01:00 | Ryuhei Azuma v Yuto Sakai | 2-6,2-6 |
| ITF日本F3 | 2018/03/17 02:30 | Kousuke Ogura v Yuto Sakai | 6-4,6-3 |
| ITF日本F2 | 2018/03/13 04:00 | 田中優之介 v Yuto Sakai | 6-4,4-6,7-6 |
| ITF日本F2 | 2018/03/12 00:30 | Yuto Sakai v 竹岛骏朗 | 6-4,6-2 |
| ITF日本F2 | 2018/03/11 04:00 | 玄吾菊池 v Yuto Sakai | 2-6,2-6 |
| ITF日本F2 | 2018/03/10 04:00 | Yuto Sakai v 尹邦碩 | 6-3,6-2 |
| ITF日本F7 | 2018/06/07 02:00 | 玄吾菊池 v Yuga Tashiro | 6-2,6-2 |
| ITF日本F7 | 2018/06/05 02:45 | Yuga Tashiro v 羽澤慎治 | 7-5,7-6 |
| ITF日本F7資格賽 | 2018/06/03 02:45 | 宮本大勢 v Yuga Tashiro | 5-7,4-6 |
| ITF日本F7資格賽 | 2018/06/02 01:00 | 上杉哲平 v Yuga Tashiro | 1-6,6-7 |
| ITF日本F4 | 2018/03/25 01:00 | Jumpei Yamasaki v Yuga Tashiro | 6-2,6-3 |
| ITF日本F3 | 2018/03/17 04:00 | Yuga Tashiro v 竹岛骏朗 | 6-7,6-1,2-6 |
| ITF日本F3 | 2018/03/17 00:30 | Yuga Tashiro v 利奧塔 Kishi | 6-7,6-3,6-0 |
| ITF日本F2 | 2018/03/10 00:30 | Yuga Tashiro v Takashi Yasugami | 6-7,6-2,4-6 |