Mitsuyo Seo

Mitsuyo Seo (瀬尾 光世, Seo Mitsuyo, 26 September 1911 – 24 August 2010) was a Japanese animator, screenwriter, and director of animated films who played a central role in the development of Japanese anime. He was born in Himeji, Hyōgo Prefecture.

Initially working as a sign painter, Seo began dabbling in drawing animation by working at a toy film company that made short movies for home entertainment. Although his most famous films were propaganda for Japan during World War II, Seo's political sympathies were leftist, and early on, he was actually a member of the Proletarian Film League of Japan, where he helped out on such animated films as Sankichi no Kūchū Ryokō. In 1931, he was arrested for his activities, tortured, and spent 21 days in jail. Seo met Kenzō Masaoka and joined his company, working on Japan's first sound animation film, Chikara to Onna no Yo no Naka, before starting his own production company in 1935, where he made cartoons featuring the character Norakuro.