Born 1911, in Himeji. Seo worked on the production of Japan's first talkie animation under Kenzo Masaoka. He also created many works commissioned by government offices and is known for the Ministry of Education music film Arichan the Ant (アリチャン, 1941) and the feature length animation for the Navy Ministry titled Momotaro's Sea Eagles (桃太郎の海鷲, 1943).
(Source: Japanese Animated Film Classics)
