How many movies have Joji Yanami and Kiyoshi Matsumoto collaborated on?

They have worked on 3 movies together! Their first movie together was Dragon Ball Z: Lord Slug (1991) while their highest rated movie together was Dragon Ball Z: Fusion Reborn (1995). They have not worked together since Dragon Ball Z: Fusion Reborn (1995). They are most known for their science fiction films together.