How many movies have Masahiro Koyama and Ryuji Nakagi collaborated on?

They have worked on 3 movies together! Their first movie together was Creamy Mami: Forever Once More (1984) while their highest rated movie together was Patlabor 2: The Movie (1993). They have not worked together since Patlabor 2: The Movie (1993). They are most known for their animation films together.