How many movies have Jouji Nakata and Kumiko Watanabe acted in together?

They have worked on 6 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 Working!!! Lord of the Takanashi (2016). They have not worked together since One Piece Film Red (2022). They are most known for their animation films together.