How many movies have Jouji Nakata and Makoto Iino collaborated on?

They have worked on 1 movie together! Their first movie together was Sergeant Keroro The Super Duper Movie 4: Crushing Invasion, Dragon Warriors (2009) and was their highest rated movie together. They have not worked together since Sergeant Keroro The Super Duper Movie 4: Crushing Invasion, Dragon Warriors (2009).