How many movies have Satoshi Okubo and Shin-ichiro Miki collaborated on?

They have worked on 2 movies together! Their first movie together was Anemone: Eureka Seven Hi-Evolution (2018) while their highest rated movie together was Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train (2020). They have not worked together since Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train (2020).