Yasuhisa Hara 's anime website has announced that the first episode of the fifth season gained postponement. However, the transmission will take place from January 13, 2024.
The first episode of the fifth season was scheduled to premiere on January 6, but was postponed due to broadcaster NHK of the New Year's earthquake on the Noto Peninsula in Ishikawa Prefecture.

Kingdom Synopsis
The story focuses on slave boy Xin and his dream of becoming a great general for the state of Qin. Xin helps Ying Zheng, the young king of Qin who shares his desire to unify China, rise to power within the state. Xin does everything he can to become a superior commander of an army capable of defeating the Seven Warring States.
Therefore, the fourth season premiered in April 2022 with Crunchyroll .
Finally, Kingdom's first season premiered in 2012, and a second season debuted in 2013. The third season, in turn, premiered in April 2020, which even came into hiatus after four episodes due to Covid-19, but then resumed the show in April 2021. The anime restarted its exhibition from the first episode.
Source: Official website