Home History
| Giappone - T League | 2022/02/10 11:18 | Koki Niwa v Maharu Yoshimura | L | 1-3 |
| Giappone - T League | 2021/12/26 10:00 | Koki Niwa v Masataka Morizono | W | 3-1 |
| World Championship | 2021/11/24 21:20 | Koki Niwa v Daniel Habesohn | L | 2-4 |
| World Championship | 2021/11/24 02:00 | Koki Niwa v Nandor Ecseki | W | 4-0 |
| Giappone - T League | 2021/10/24 09:00 | Tomokazu Harimoto v Koki Niwa | L | 3-0 |
| Giappone - T League | 2021/10/23 06:00 | Tomokazu Harimoto v Koki Niwa | L | 3-0 |
| Giappone - T League | 2021/09/22 10:00 | Koki Niwa v Mizuki Oikawa | L | 2-3 |
| Olimpiadi 2020 - Squadre maschili 2020 | 2021/08/06 03:00 | Youngsik Jeoung v Koki Niwa | L | 3-0 |