How many movies have Isao Takahata and Tomohito Sumida collaborated on?

They have worked on 1 movie together! Their first movie together was The Little Prince and the Eight-Headed Dragon (1963) and was their highest rated movie together. They have not worked together since The Little Prince and the Eight-Headed Dragon (1963).

Crew
Assistant Director
Role
Susano (voice)
Crew
Producer's Assistant