The 26th and final episode of the third Kingdom anime series ended with an announcement that a fourth series will premiere in Spring 2022.

The third anime series based on Yasuhisa Hara’s Kingdom manga premiered on Japanese television in April 2020. The anime’s production committee announced later that month that it was delaying the broadcast of the series’ Episode 5 and later episodes due to the Japanese government’s first state of emergency against COVID-19. The third series resumed airing on Japanese television on April 4, 2021. The anime restarted its airing from the first episode. FUNimation Entertainment simulcast the anime as it aired in Japan.

Source: ANN