Stadium: Court 1 Round: 54 Ground: Clay
| ITF China F3 | 2018/01/25 05:15 | Issei Okamura v Tsung-Hua Yang | 3-6,1-6 |
| ITF China F3 | 2018/01/24 05:30 | Issei Okamura v Cing-Yang Meng | 7-6,6-2 |
| ITF China F3 | 2018/01/23 02:30 | Yan Bai v Issei Okamura | 1-6,0-6 |
| ITF China F2 | 2018/01/18 02:30 | Issei Okamura v Goran Markovic | 6-2,0-6,5-7 |
| ITF China F2 | 2018/01/16 03:40 | Hu Liu v Issei Okamura | 7-5,4-6,2-6 |
| ITF China F1 | 2018/01/11 02:30 | Ryota Tanuma v Issei Okamura | 6-1,6-2 |
| ITF China F1 | 2018/01/09 04:50 | Issei Okamura v Lingxi Zhao | 3-6,6-3,6-4 |
| ITF Vietnam F3 | 2017/11/25 03:00 | Issei Okamura v Arjun Kadhe | 1-6,1-6 |
| ITF Japan F5 | 2017/04/01 02:00 | Ibuki Furuta v Yuta Kawahashi | 6-2,6-4 |
| ITF Japan F4 | 2017/03/28 03:00 | Yuta Kawahashi v Tung-Lin Wu | 7-6,1-6,4-6 |
| ITF Japan F3 | 2017/03/18 08:00 | Masaya Kobayashi v Yuta Kawahashi | 6-2,7-5 |
| ITF Japan F2 | 2017/03/11 03:00 | Yuta Kawahashi v Keisuke Watanuki | 2-6,2-6 |
| ITF Japan F1 | 2017/03/04 01:00 | Sota Fujii v Yuta Kawahashi | 4-6,6-3,2-6 |
| ITF Japan F6 Qual | 2016/05/29 01:00 | Ryota Kishi v Yuta Kawahashi | 6-2,6-4 |
| ITF Japan F5 | 2016/04/08 01:00 | Yuta Kawahashi v Sho Katayama | 1-6,2-6 |
| ITF Japan F5 | 2016/04/06 00:30 | Yuta Kawahashi v Masayoshi Ono | 6-2,6-2 |