Head to Head
| Japan Open | 2019/06/14 04:20 | Kazuhiro Yoshimura v Koki Niwa | L | 4-2 |
| China Open | 2019/05/30 08:55 | Kazuhiro Yoshimura v Koki Niwa | W | 0-4 |
| Qatar Open - Damer | 2018/11/09 13:20 | Koki Niwa v Kazuhiro Yoshimura | W | 4-0 |
| Qatar Open - Damer | 2018/06/08 04:30 | Koki Niwa v Kazuhiro Yoshimura | L | 2-4 |
Home History
| Japan - T. League | 2020/12/23 11:35 | Jun Mizutani v Koki Niwa | L | 3-2 |
| Japan - T. League | 2020/12/22 06:30 | Panagiotis Gionis v Koki Niwa | W | 2-3 |
| Japan - T. League | 2020/12/20 09:30 | Koki Niwa v Kenta Matsudaira | L | 2-3 |
| Japan - T. League | 2020/12/16 07:30 | Koki Niwa v Shunsuke Togami | L | 0-3 |
| Japan - T. League | 2020/12/15 08:00 | Jun Mizutani v Koki Niwa | W | 1-3 |
| Japan - T. League | 2020/12/11 01:00 | Koki Niwa v Shunsuke Togami | L | 0-3 |
| Japan - T. League | 2020/12/10 04:30 | Hiroto Shinozuka v Koki Niwa | W | 1-3 |
| ITTF Finals | 2020/11/20 04:30 | Gaoyuan Lin v Koki Niwa | L | 4-0 |
Away History
| Japan - T. League | 2020/12/17 04:30 | Jun Mizutani v Kazuhiro Yoshimura | L | 3-1 |
| Japan - T. League | 2020/12/04 04:30 | Takuya Jin v Kazuhiro Yoshimura | W | 2-3 |
| Japan - T. League | 2020/02/16 04:20 | Kazuhiro Yoshimura v Yuya Oshima | L | 2-3 |
| Japan - T. League | 2020/01/26 06:30 | Kenta Matsudaira v Kazuhiro Yoshimura | W | 2-3 |
| Japan - T. League | 2020/01/25 10:20 | Jun Mizutani v Kazuhiro Yoshimura | W | 2-3 |
| Japan - T. League | 2019/11/23 05:20 | Kazuhiro Yoshimura v Takuya Jin | L | 2-3 |
| Japan - T. League | 2019/08/29 09:57 | Jun Mizutani v Kazuhiro Yoshimura | L | 3-0 |
| Bulgaria Open | 2019/08/15 17:10 | Jun Mizutani v Kazuhiro Yoshimura | L | 4-0 |