Shortly after the conclusion of the third season of My Hero Academia, a fourth season was announced, but lacked a date. While an official day was not specified, the fourth season of My Hero Academia is scheduled to air October 2019 in Japan.
This season airs much later than the previous season (which began in April 2018) and is likely due to a broadcast conflict.
Accompanying the date was a new visual featuring Izuku “Deku” Midoriya and Mirio Togata.
— 僕のヒーローアカデミア_アニメ公式 (@heroaca_anime) December 19, 2018