How many movies have Hideki Hamasu and Masahiro Andoh collaborated on?

They have worked on 4 movies together! Their first movie together was Galaxy Express 999: Eternal Fantasy (1998) while their highest rated movie together was One Piece: Baron Omatsuri and the Secret Island (2005). They have not worked together since One Piece: Baron Omatsuri and the Secret Island (2005). They are most known for their animation films together.