"Demon Slayer: Kimetsu no Yaiba - To The Hashira Training On Demand" is a special episode that serves as a bridge between the main storyline of the series and the upcoming movie, "Demon Slayer: Kimetsu no Yaiba - The Movie: Mugen Train". The episode focuses on Tanjiro Kamado and his friends as they undergo rigorous training with the Hashira, the strongest warriors in the Demon Slayer Corps.