How many movies have Katsuji Mori and Masatoshi Tahara collaborated on?

They have worked on 2 movies together! Their first movie together was Legend of the Galactic Heroes: My Conquest Is the Sea of Stars (1988) while their highest rated movie together was Legend of the Galactic Heroes: Overture to a New War (1993). They have not worked together since Legend of the Galactic Heroes: Overture to a New War (1993).