Yoriichi Type Zero
Tanjiro encounters Mist Hashira Muichiro Tokito and Kotetsu, a boy from the village, arguing. Muichiro demands that a "certain key" be handed over to him from Kotetsu. Being unable to look on in silence, Tanjiro intervenes to speak on behalf of Kotetsu. However, Muichiro refuses to listen. According to Kotetsu, the key is used to operate a battle-type mechanical doll, Yoriichi Type Zero, that mimics the movement of a certain real-life swordsman...
Aired 16/04/2023EP 2 - Yoriichi Type Zero

Demon Slayer: Kimetsu no Yaiba Swordsmith Village Arc
Tanjiro’s journey leads him to the Swordsmith Village, where he reunites with two Hashira, members of the Demon Slayer Corps’ highest-ranking swordsmen - Mist Hashira Muichiro Tokito and Love Hashira Mitsuri Kanroji. With the shadows of demons lurking near, a new battle begins for Tanjiro and his comrades.
Notes:
• The first episode has a runtime of ~49 minutes, and received an early premiere in cinemas worldwide as part of a special screening alongside the final two episodes of Kimetsu no Yaiba: Yuukaku-hen.
• The final episode has a runtime of ~52 minutes.