| Competition: | Japanese Regional Leagues |
| Season: | 2020 |
| Promoted: | Tiamo Hirakata FC Kariya |
| Prevseason: | 2019 |
| Nextseason: | 2021 |
A total of 134 teams competed, split into 9 groups, in the Japanese Regional Leagues, the fifth tier of the Japanese association football league system, in 2020. Due to the COVID-19 pandemic in Japan, all matches in all regions were changed from double round-robin into single round-robin, except Chūgoku and Tōkai.
All regional champions qualified for the Japanese Regional Football Champions League. Like the J.League, there was no relegation in this season to Prefectural Leagues (promotion and relegation between divisions were still available for some regions).
| Region | Champions | |
|---|---|---|
| Hokkaido | Hokkaido Tokachi Sky Earth | |
| Tohoku | Blancdieu Hirosaki | |
| Kantō | Tochigi City | |
| Hokushinetsu | Fukui United FC | |
| Tōkai | FC Kariya | |
| Kansai | Tiamo Hirakata | |
| Chūgoku | SRC Hiroshima | |
| Shikoku | FC Tokushima | |
| Kyushu | Okinawa SV |
Owing to the coronavirus pandemic, the Tōkai region played a knockout tournament to decide the team qualifying for the 2020 Regional Promotion Series (for Division 1 only).
In Division 1, Yazaki Valente did not participate, so Kariya received a bye to the semi-finals.
In Division 2, Bombonera Gifu did not participate, so Toyota received a bye to the semi-finals.
Due to the coronavirus pandemic, the Chūgoku region played in a tournament known as the CSL Championship 2020, or C-1 Cup, with 8 teams competing for a spot in the 2020 Regional Promotion Series.NTN Okayama and Dezzolla Shimane did not participate in this season.
On August 11, the Kyushu League was abandoned, due to Kaiho Bank's withdrawal and the spread of coronavirus in Okinawa and Kumamoto. Okinawa SV, as the 2019 Kyushu League champions, are elected to play in the Regional Promotion Series.