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

They have worked on 3 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 Sergeant Keroro The Super Duper Movie 3: Keroro vs. Keroro Great Sky Duel (2008). They have not worked together since Sergeant Keroro The Super Duper Movie 4: Crushing Invasion, Dragon Warriors (2009). They are most known for their comedy films together.