How many movies have Akio Watanabe and Hitoshi Fujima collaborated on?

They have worked on 3 movies together! Their first movie together was The Labyrinth of Grisaia (2015) while their highest rated movie together was Grisaia: Phantom Trigger the Animation - Stargazer (2020). They have not worked together since Grisaia: Phantom Trigger the Animation - Stargazer (2020). They are most known for their animation films together.