How many movies have Hanaka Adachi and Shin-ichiro Miki collaborated on?

They have worked on 1 movie together! Their first movie together was Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train (2020) and was their highest rated movie together. They have not worked together since Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train (2020).