How many movies have Akihiro Okuzawa and Hajime Kamegaki collaborated on?

They have worked on 4 movies together! Their first movie together was One Piece: Episode of Chopper Plus: Bloom in the Winter, Miracle Cherry Blossom (2008) while their highest rated movie together was Detective Conan: Episode One - The Great Detective Turned Small (2016). They have not worked together since Case Closed: The Fist of Blue Sapphire (2019). They are most known for their animation films together.