How many movies have Katsuhisa Houki and Nobuyuki Hiyama acted in together?

They have worked on 4 movies together! Their first movie together was Captain Tsubasa Movie 05: The Most Powerful Opponent! Holland Youth (1994) and was their highest rated movie together. They have not worked together since One Piece "3D2Y": Overcome Ace's Death! Luffy's Vow to his Friends (2014). They are most known for their animation films together.