Masaaki Ōsumi (大隅 正秋, Ōsumi Masaaki; born November 26, 1934) is a Japanese theatre director and film director who is known for his work in animated television series and films. He was born in Hyōgo Prefecture, Japan. He completed the Master's Program in Media Science, Graduate School of Media Science, Tokyo University of Technology. He is also the creative advisor at the Katayanagi Research Institute, Tokyo University of Technology.
Source: “Masaaki Ōsumi”, English Wikipedia (CC BY-SA 4.0), excerpt