How many movies have Hirofumi Masuda and Masakatsu Sasaki collaborated on?

They have worked on 5 movies together! Their first movie together was Slayers Return (1996) while their highest rated movie together was Doraemon: Nobita's Dinosaur (2006). They have not worked together since Doraemon: Nobita and the Space Heroes (2015). They are most known for their fantasy films together.