Osamu Dezaki
In October 1972, this core group of artists (who included Osamu Dezaki, Rintaro, and Yoshiaki Kawajiri) left Mushi Production and founded Madhouse. From that time onward, Maruyama focused mainly on producing and planning Madhouse's upcoming projects. In the late 1980s and early 1990s, he also did production design on several films. In 2002, Maruyama was awarded the "Special/Lifetime Achievement" Award at the 7th Animation Kobe in recognition and honor of his contributions to the industry. He was the first producer to be given the award.