In approximately 1973, he made his first appearance at Tatsunoko Production. He was responsible for writing the scripts for 11 episodes in the original Mobile Suit Gundam television anime series and also wrote the script for the entire Mobile Suit Gundam - The Movie Trilogy. As an author, he created several popular series such as Angie Girl and J9, which were aired in three TV series (Bryger, Baxinger, and Sasuraiger) between 1981 and 1984, with Monkey Punch collaborating on the original character design.