How many movies have Katsuyuki Sumisawa and Ken Narita collaborated on?

They have worked on 3 movies together! Their first movie together was Inuyasha the Movie: Affections Touching Across Time (2001) while their highest rated movie together was Inuyasha the Movie 3: Swords of an Honorable Ruler (2003). They have not worked together since Mobile Suit Gundam: The Origin VI – Rise of the Red Comet (2018). They are most known for their animation films together.