The new season adapts the "Paranormal Liberation War" arc of Kōhei Horikoshi's original manga, which features an all-out war between heroes and villains.
The anime's first 13-episode season premiered in April 2016. The 25-episode second season premiered in April 2017, and the third season premiered in April 2018 and ran for 25 episodes. The fourth season premiered in Japan in October 2019, and aired for 25 episodes. A two-episode original video anime for the franchise streamed in Japan in August 2020, and Funimation and Crunchyroll streamed the episodes.
The show's fifth season premiered in Japan in March 2021, and aired for 25 episodes.
A new two-episode original video anime is screening in Japan this month before streaming online this summer. Crunchyroll will stream the episodes this summer, and it will screen the North American premiere at this year's Anime Expo event on July 1 at 12:00 p.m. PDT.
Source: Comic Natalie