| 2021.03.14 | Yokogawa Musashino FC | 2-2 | ReinMeer Aomori F.C. | Away | Ave. Age | 25.6y.o. | Ave. Change Time | 72.2min. |
| 2021.03.21 | Kochi United FC | 2-1 | ReinMeer Aomori F.C. | Away | Ave. Age | 26.6y.o. | Ave. Change Time | 67.0min. |
| 2021.03.27 | F.C. Osaka | 1-0 | ReinMeer Aomori F.C. | Away | Ave. Age | 25.9y.o. | Ave. Change Time | 69.4min. |
| 2021.04.04 | ReinMeer Aomori F.C. | 0-2 | Atletico Suzuka | Home | Ave. Age | 27.4y.o. | Ave. Change Time | 63.0min. |
| 2021.04.11 | Iwaki FC | 1-1 | ReinMeer Aomori F.C. | Away | Ave. Age | 25.5y.o. | Ave. Change Time | 79.8min. |
| 2021.05.05 | ReinMeer Aomori F.C. | 2-1 | Honda FC | Home | Ave. Age | 25.9y.o. | Ave. Change Time | 71.2min. |
| 2021.05.16 | FC Kagura-Shimane | 1-2 | ReinMeer Aomori F.C. | Away | Ave. Age | 25.9y.o. | Ave. Change Time | 75.5min. |
| 2021.05.23 | ReinMeer Aomori F.C. | 3-2 | Reilac Shiga | Home | Ave. Age | 26.9y.o. | Ave. Change Time | 82.5min. |
| 2021.05.30 | ReinMeer Aomori F.C. | 2-2 | Verspah Oita | Home | Ave. Age | 26.2y.o. | Ave. Change Time | 66.0min. |
| 2021.06.09 | ReinMeer Aomori F.C. | 1-0 | FC Maruyasu Okazaki | Home | Ave. Age | 27.2y.o. | Ave. Change Time | 73.0min. |
| 2021.06.13 | ReinMeer Aomori F.C. | 1-1 | Sony Sendai FC | Home | Ave. Age | 25.6y.o. | Ave. Change Time | 71.0min. |
| 2021.06.19 | Nara Club | 0-1 | ReinMeer Aomori F.C. | Away | Ave. Age | 27.2y.o. | Ave. Change Time | 69.0min. |
| 2021.06.26 | ReinMeer Aomori F.C. | 2-2 | FC TIAMO Hirakata | Home | Ave. Age | 26.3y.o. | Ave. Change Time | 66.2min. |
| 2021.07.03 | Veertien Mie | 2-1 | ReinMeer Aomori F.C. | Away | Ave. Age | 26.1y.o. | Ave. Change Time | 70.2min. |
| 2021.07.11 | ReinMeer Aomori F.C. | 2-1 | MinebeaMitsumi FC | Home | Ave. Age | 25.6y.o. | Ave. Change Time | 67.6min. |
| 2021.07.18 | FC Kariya | 1-3 | ReinMeer Aomori F.C. | Away | Ave. Age | 26.1y.o. | Ave. Change Time | 78.4min. |
| 2021.07.25 | ReinMeer Aomori F.C. | 2-2 | Kochi United FC | Home | Ave. Age | 26.6y.o. | Ave. Change Time | 74.6min. |
| 2021.08.22 | ReinMeer Aomori F.C. | 1-0 | Yokogawa Musashino FC | Home | Ave. Age | 26.3y.o. | Ave. Change Time | 67.8min. |
| 2021.08.28 | Honda FC | 2-0 | ReinMeer Aomori F.C. | Away | Ave. Age | 26.1y.o. | Ave. Change Time | 60.4min. |
| 2021.09.04 | ReinMeer Aomori F.C. | 3-2 | FC Kagura-Shimane | Home | Ave. Age | 26.0y.o. | Ave. Change Time | 55.0min. |
| 2021.09.12 | Verspah Oita | 1-0 | ReinMeer Aomori F.C. | Away | Ave. Age | 26.1y.o. | Ave. Change Time | 59.8min. |
| 2021.10.03 | Sony Sendai FC | 1-0 | ReinMeer Aomori F.C. | Away | Ave. Age | 27.6y.o. | Ave. Change Time | 58.5min. |
| 2021.10.10 | ReinMeer Aomori F.C. | 0-0 | Nara Club | Home | Ave. Age | 26.3y.o. | Ave. Change Time | 63.4min. |
| 2021.10.17 | ReinMeer Aomori F.C. | 1-1 | Veertien Mie | Home | Ave. Age | 26.1y.o. | Ave. Change Time | 59.8min. |
| 2021.10.24 | FC TIAMO Hirakata | 1-3 | ReinMeer Aomori F.C. | Away | Ave. Age | 25.8y.o. | Ave. Change Time | 77.8min. |
| 2021.10.30 | ReinMeer Aomori F.C. | 1-6 | Iwaki FC | Home | Ave. Age | 26.0y.o. | Ave. Change Time | 57.4min. |
| 2021.11.03 | Atletico Suzuka | 3-0 | ReinMeer Aomori F.C. | Away | Ave. Age | 26.5y.o. | Ave. Change Time | 55.2min. |
| 2021.11.07 | ReinMeer Aomori F.C. | 1-4 | F.C. Osaka | Home | Ave. Age | 26.9y.o. | Ave. Change Time | 48.3min. |
| 2021.11.14 | ReinMeer Aomori F.C. | 3-2 | FC Kariya | Home | Ave. Age | 25.8y.o. | Ave. Change Time | 61.5min. |
| 2021.11.21 | MinebeaMitsumi FC | 0-0 | ReinMeer Aomori F.C. | Away | Ave. Age | 26.0y.o. | Ave. Change Time | 65.6min. |
| 2021.11.27 | Reilac Shiga | 3-1 | ReinMeer Aomori F.C. | Away | Ave. Age | 26.5y.o. | Ave. Change Time | 69.5min. |
| 2021.12.05 | FC Maruyasu Okazaki | 0-1 | ReinMeer Aomori F.C. | Away | Ave. Age | 26.5y.o. | Ave. Change Time | 72.0min. |