 He was a leader in a labor dispute soon after his arrival, and became chief secretary of Toei's labor union in 1964.Miyazaki later worked as chief animator, concept artist, and scene designer on "The Great Adventure of Horus, Prince of the Sun" (1968).Throughout the film's production, Miyazaki worked closely with his mentor, Yasuo Ōtsuka, whose approach to animation profoundly influenced Miyazaki's work.