How many movies have Kappei Yamaguchi and Takashi Otsuka collaborated on?

They have worked on 5 movies together! Their first movie together was Pretty Cure All Stars DX: Everyone Is a Friend - A Miracle All Pretty Cures Together (2009) while their highest rated movie together was Pretty Cure All Stars DX3: Deliver the Future! The Rainbow-Colored Flower That Connects the World (2011). They have not worked together since One Piece: Stampede (2019). They are most known for their action films together.