How many movies have Takashi Shimada and Yoshinori Nakai collaborated on?

They have worked on 6 movies together! Their first movie together was Kinnikuman: The Stolen Championship Belt (1984) while their highest rated movie together was Kinnikuman: Justice Superman vs. Ancient Superman (1985). They have not worked together since Justice Supermen vs. Fighter Supermen (1986). They are most known for their animation films together.