The “Demon Slayer: Kimetsu no Yaiba – Hashira Training Arc” is part of the ongoing Demon Slayer anime series produced by ufotable, a studio known for its high-quality animation. While the full credits for the arc may not always be widely publicized, the main staff involved generally includes:

• Director: Haruo Sotozaki – He has directed the Demon Slayer anime series since the beginning.
• Animation Studio: ufotable – Responsible for all animation, backgrounds, and visual effects.
• Character Designer / Chief Animation Director: Akira Matsushima – Oversees the character design adaptations from the manga and supervises animation quality.
• Series Composition / Script Supervision: Haruo Sotozaki works closely with the writing team to ensure the story adaptation follows the manga.
• Music Composer: Yuki Kajiura and Go Shiina – They provide the soundtrack that’s iconic for the series’ emotional and action scenes.
• Sound Director: Jin Aketagawa – Handles sound effects and voice recording direction.

In addition to these key roles, there’s a large team of animators, key animators, background artists, color designers, and production staff that work on each episode. Ufotable tends to keep detailed credit listings in the end credits of each episode.