Demon Slayer: Kimetsu no Yaiba season 4

Demon Slayer: Kimetsu no Yaiba is a Japanese anime television series based on Koyoharu Gotouge's manga series of the same name. At the end of the third season finale, a fourth season covering the manga's "Hashira Training" arc was announced. The fourth and final season, titled Demon Slayer: Kimetsu no Yaiba – Hashira Training Arc, adapts from the 15th and 16th volumes (chapters 128–139) of the manga. It premiered on May 12, 2024, with a one-hour episode. The season ended with a one-hour special, which aired on June 30 of the same year.

The season follows Tanjiro and his allies as they enter "Hashira Training"; an organized regimen led by the Hashira to prepare them for the coming conflict against Muzan Kibutsuji, who continues to search for Nezuko and Kagaya Ubuyashiki.

A compilation film titled Demon Slayer: Kimetsu no Yaiba – To the Hashira Training, which includes footage from the final Swordsmith Village Arc episode and an advanced screening of the first Hashira Training Arc episode, premiered in Japanese theaters on February 2, 2024. Aniplex of America licensed the season outside of Asia and streamed it on Crunchyroll, which began streaming an English dub on June 30, 2024.

The opening theme song is "Mugen" (夢幻), while the ending theme is "Tokoshie" (トコシエ), both performed by My First Story and Hyde.