| J1 League 2020 - Appearances as Assistant | ||||
| 26/07/2020 | Shimizu S-Pulse | - | Oita Trinita | 4:2 |
| 24/10/2020 | Kashima Antlers | - | Sanfrecce Hiroshima | 1:0 |
| J1 League 2020 - Appearances as Assistant | ||||
| 26/07/2020 | Shimizu S-Pulse | - | Oita Trinita | 4:2 |
| 24/10/2020 | Kashima Antlers | - | Sanfrecce Hiroshima | 1:0 |
| Complete name: | Masashi Yamagiwa |
| Born: | 16/03/1980 |
| Place of birth: |
Japan |
| Nationality: |
Japan |