How many movies have Haruhito Takada and Ryusei Nakao collaborated on?

They have worked on 6 movies together! Their first movie together was Go! Anpanman: Let's Defeat the Haunted Ship!! (1995) while their highest rated movie together was Go! Anpanman: The Palm of the Hand to the Sun (1998). They have not worked together since Go! Anpanman: Tears of the Mermaid Princess (2000). They are most known for their animation films together.