How many movies have Akiji Kobayashi and Yuzo Higuchi collaborated on?

They have worked on 1 movie together! Their first movie together was ウルトラマン前夜祭 ウルトラマン誕生 (1966) and was their highest rated movie together. They have not worked together since ウルトラマン前夜祭 ウルトラマン誕生 (1966).