How many movies have Hideki Takahashi and Yuko Yazaki collaborated on?

They have worked on 3 movies together! Their first movie together was One Piece: Baron Omatsuri and the Secret Island (2005) while their highest rated movie together was The Girl Who Leapt Through Time (2006). They have not worked together since The Girl Who Leapt Through Time (2006). They are most known for their animation films together.