How many movies have Ichiro Nagai and Tomoharu Katsumata collaborated on?

They have worked on 4 movies together! Their first movie together was Hans Christian Andersen's The Little Mermaid (1975) while their highest rated movie together was Be Forever Yamato (1980). They have not worked together since Saint Elmo - Apostle of Light (1986). They are most known for their animation films together.