How many movies have Keiko Yamamoto and Masahiro Andoh collaborated on?

They have worked on 3 movies together! Their first movie together was Galaxy Express 999: Eternal Fantasy (1998) while their highest rated movie together was One Piece: Curse of the Sacred Sword (2004). They have not worked together since One Piece: Curse of the Sacred Sword (2004). They are most known for their animation films together.