Head to Head
| T2 Diamond | 2019/11/23 12:00 | Koki Niwa v Tomokazu Harimoto | W | 2-4 |
| Qatar Open XD | 2017/06/24 07:30 | Tomokazu Harimoto v Koki Niwa | W | 4-0 |
Home History
| World Cup | 2019/11/30 02:30 | Tomokazu Harimoto v Quadri Aruna | W | 4-1 |
| T2 Diamond | 2019/11/24 06:15 | Xin Xu v Tomokazu Harimoto | L | 3-1 |
| T2 Diamond | 2019/11/23 12:00 | Koki Niwa v Tomokazu Harimoto | W | 2-4 |
| T2 Diamond | 2019/11/21 05:30 | Zhe Yu Clarence Chew v Tomokazu Harimoto | W | 1-4 |
| Austrian Open | 2019/11/15 16:50 | Dimitrij Ovtcharov v Tomokazu Harimoto | L | 4-3 |
| Austrian Open | 2019/11/14 14:50 | Ruwen Filus v Tomokazu Harimoto | W | 1-4 |
| Team World Cup | 2019/11/09 08:45 | Zhendong Fan v Tomokazu Harimoto | L | 3-0 |
| Team World Cup | 2019/11/07 12:00 | Tomokazu Harimoto v Patrick Franziska | W | 3-1 |
Away History
| World Cup | 2019/11/30 03:15 | Sangsu Lee v Koki Niwa | W | 2-4 |
| T2 Diamond | 2019/11/23 12:00 | Koki Niwa v Tomokazu Harimoto | L | 2-4 |
| T2 Diamond | 2019/11/21 13:15 | Koki Niwa v Hugo Calderano | W | 4-2 |
| Austrian Open | 2019/11/16 15:50 | Hugo Calderano v Koki Niwa | L | 4-2 |
| Austrian Open | 2019/11/15 16:50 | Koki Niwa v Mattias Falck | W | 4-2 |
| Austrian Open | 2019/11/14 17:20 | Koki Niwa v Benedikt Duda | W | 4-2 |
| Team World Cup | 2019/11/06 09:00 | Koki Niwa v Daniel Habesohn | W | 3-2 |
| Team World Cup | 2019/11/06 03:30 | Liam Pitchford v Koki Niwa | L | 3-0 |