Saiyuuki

A young monkey assumes leadership over others and is crowned king. After acquiring magical abilities, he grows arrogant and confronts the deities in the heavens. Defeated by King Amo, he is punished and assigned to protect Prince Amat as part of his lesson in humility. Osamu Tezuka was credited as a director by Toei Company, but he later clarified that his only appearance at the studio was for promotional photographs. Despite minimal involvement in production, his participation in the film's promotion sparked his interest in animation.