How many movies have Hiroshi Nagahama and Yoshihiko Umakoshi collaborated on?

They have worked on 2 movies together! Their first movie together was Revolutionary Girl Utena: The Adolescence of Utena (1999) while their highest rated movie together was Mushi-Shi: The Next Chapter - Drops of Bells (2015). They have not worked together since Mushi-Shi: The Next Chapter - Drops of Bells (2015).