How many movies have Koichi Yamadera and Tenshi Yamamoto collaborated on?

They have worked on 5 movies together! Their first movie together was Go! Anpanman: The Shining Star's Tear (1989) while their highest rated movie together was Go! Anpanman: Let's Defeat the Haunted Ship!! (1995). They have not worked together since Go! Anpanman: The Pyramid of the Rainbow (1997). They are most known for their animation films together.