How many movies have Mayumi Tanaka and Motoaki Ikegami collaborated on?

They have worked on 4 movies together! Their first movie together was Dragon Ball: Sleeping Princess in Devil's Castle (1987) while their highest rated movie together was Dragon Ball: Mystical Adventure (1988). They have not worked together since Dragon Ball Z: The Tree of Might (1990). They are most known for their animation films together.