| Competition: | Japanese Regional Leagues |
| Season: | 2021 |
| Promoted: | Criacao Shinjuku |
| Prevseason: | 2020 |
| Nextseason: | 2022 |
The Japanese Regional Leagues, the fifth tier of the Japanese association football league system, played a regular season in 2021.
The tournament was terminated on August 26 due to the restrictions caused by the Covid-19 pandemic.
The tournament was terminated on Sep 6 due to the restrictions caused by the Covid-19 pandemic.
The tournament was terminated due to the restrictions caused by the Covid-19 pandemic.
The tournament was terminated due to the restrictions caused by the Covid-19 pandemic.
The tournament was terminated due to the restrictions caused by the Covid-19 pandemic.
The tournament was terminated due to the restrictions caused by the Covid-19 pandemic.
The tournament was terminated on August 11 due to the restrictions caused by the Covid-19 pandemic.
In the Kyushu Soccer League, drawn games were decided on penalty shootouts. The winners of these shootouts were awarded two points, while the losers were awarded one.