How many movies have Hachidai Takayama and Yoshimi Umino collaborated on?

They have worked on 3 movies together! Their first movie together was Martian Successor Nadesico: The Motion Picture - Prince of Darkness (1998) while their highest rated movie together was Laid-Back Camp the Movie (2022). They have not worked together since Laid-Back Camp the Movie (2022). They are most known for their animation films together.