Season four of the anime adaptation of Demon Slayer: Kimetsu no Yaiba, titled Hashira Training Arc, is announced following the conclusion of the third season Swordsmith Village Arc. Alongside the announcement, a teaser visual and PV were also released. However, the official broadcast date and further details of season four have not yet been revealed.

The story of Demon Slayer is set in the Taisho era of Japan and follows the protagonist Tanjiro, who lives by selling charcoal. One day, he returns home to find that his entire family has been brutally murdered by demons, with only his sister Nezuko surviving the attack, but turned into a demon herself. Devastated by the loss of his family and determined to find a way to turn his sister back into a human, Tanjiro sets out on a journey to become a demon slayer.