How many movies have Rokuro Naya and Yoshiko Kamei acted in together?

They have worked on 1 movie together! Their first movie together was ウルトラニャン2 ハッピー大作戦 (1998) and was their highest rated movie together. They have not worked together since ウルトラニャン2 ハッピー大作戦 (1998).