How many movies have Seiji Yokoyama and Tomoharu Katsumata collaborated on?

They have worked on 3 movies together! Their first movie together was Future War 198X (1982) while their highest rated movie together was Great Conquest: The Romance of Three Kingdoms (1992). They have not worked together since Sangokushi: The Yangtze Is Burning! (1993). They are most known for their drama films together.