How many movies have Takao Abo and Yasushi Muraki collaborated on?

They have worked on 4 movies together! Their first movie together was Revolutionary Girl Utena: The Movie (1999) while their highest rated movie together was Cowboy Bebop: The Movie (2001). They have not worked together since RahXephon: Pluralitas Concentio (2003). They are most known for their animation films together.