How many movies have Isao Takahata and Kiyoshi Kawakubo collaborated on?

They have worked on 2 movies together! Their first movie together was The Little Prince and the Eight-Headed Dragon (1963) while their highest rated movie together was 3000 Leagues in Search of Mother: The Movie (1980). They have not worked together since 3000 Leagues in Search of Mother: The Movie (1980).