How many movies have Jouji Nakata and Junichi Sato collaborated on?

They have worked on 7 movies together! Their first movie together was Sergeant Keroro The Super Duper Movie 2: Deep Sea Princess (2007) while their highest rated movie together was Tamayura: Graduation Photo Part 3 - Akogare (2015). They have not worked together since Tamayura: Graduation Photo Part 4 - Ashita (2016). They are most known for their animation films together.