How many movies have Masahiro Naoi and Tadayoshi Yamamuro collaborated on?

They have worked on 4 movies together! Their first movie together was Dragon Ball Z: The Tree of Might (1990) while their highest rated movie together was Dragon Ball: The Path to Power (1996). They have not worked together since Yes! Precure 5 Go Go! Movie: Happy Birthday in the Land of Sweets (2008). They are most known for their animation films together.