Round: 27 Ground: Hardcourt outdoor
| ITF Japan F1 | 2017/03/09 01:00 | Liang-Chi Huang v Kaito Itsusaki | 4-6,0-6 |
| ITF Japan F1 | 2017/03/08 03:00 | Taiki Hashimoto v Kaito Itsusaki | 2-6,1-6 |
| ITF Japan F1 | 2017/03/06 01:00 | Kaito Itsusaki v Keisuke Watanuki | 6-3,6-3 |
| ITF Japan F1 | 2017/03/05 01:00 | Yutaro Matsuzaki v Kaito Itsusaki | 4-6,2-6 |
| Challenger Yokohama Qual | 2017/02/26 02:20 | Kaito Itsusaki v Jumpei Yamasaki | 3-6,3-6 |
| Challenger Yokohama Qual | 2017/02/25 02:55 | Peter Kobelt v Kaito Itsusaki | 6-7,6-7 |
| ITF Japan F5 | 2016/04/03 02:30 | Ryota Kishi v Kaito Itsusaki | 6-3,6-1 |
| ITF Japan F1 | 2015/03/08 01:00 | Shunrou Takeshima v Kaito Itsusaki | 6-2,6-4 |
| ITF Japan F1 | 2017/03/09 01:00 | Gengo Kikuchi v Takuto Niki | 0-6,4-6 |
| ITF Japan F1 | 2017/03/08 02:30 | Shinta Fujii v Takuto Niki | 6-7,2-6 |
| Challenger Yokohama | 2017/03/01 01:00 | Andrew Whittington v Takuto Niki | 6-4,7-6 |
| Challenger Yokohama | 2017/02/28 02:20 | Takuto Niki v Masato Shiga | 6-1,6-1 |
| Challenger Yokohama Qual | 2017/02/27 01:00 | Alex Bolt v Takuto Niki | 2-6,4-6 |
| Challenger Yokohama Qual | 2017/02/26 03:20 | Hiroyasu Ehara v Takuto Niki | 7-6,1-6,3-6 |
| Challenger Yokohama Qual | 2017/02/25 06:00 | Takuto Niki v Axel Michon | 6-2,2-6,7-5 |
| Challenger Kyoto Qual | 2017/02/19 03:20 | Alex Bolt v Takuto Niki | 6-4,6-7,6-2 |