Time Bokan
Kōichi Mashimo was born in Tokyo, Japan and from his early years showed interest in photography, under the influence of his father. Mashimo studied jurisprudence at Sophia University and during his fourth university year, he participated in the making of several television commercials. However, this was a rather disappointing experience, and on November 6, 1975, he applied for a position of Hiroshi Sasagawa's assistant director in Tatsunoko Production. The first anime series he worked on was "Time Bokan" (1975–76).