A new trailer has been released for the upcoming fourth season of Demon Slayer: Kimetsu no Yaiba Hashira Training Arc!
Alongside the new trailer, it was confirmed that the new season will premiere on May 12, 2024 with a one-hour episode.
After Tanjiro Kamado and Mist Hashira Muichiro Tokito, along with Genya Shinazugawa, the Love Hashira Mitsuri Kanroji, and Nezuko Kamado, defeat two upper-rank demons in the Swordsmith Village Arc, the Demon Slayer Corps find themselves in their best position yet to defeat Muzan Kibutsuji and the demons for good. However, now two Hashira down after the death of the Flame Hashira Kyojuro Rengoku and the retirement of the Sound Hashira Tengen Uzui, all the Corps members must step up and improve their skills.
Now, the entire Demon Slayer Corps must train under the Hashira as they prepare for the final battle.

The first episode had a theatrical run in February, playing alongside the emotionally charged final episode of the Swordsmith Village Arc.
Demon Slayer: Kimetsu no Yaiba Hashira Training Arc will simulcast on Crunchyroll after it airs in Japan beginning May 12.