How many movies have Nobuo Yajima and Yoshinori Watanabe collaborated on?

They have worked on 3 movies together! Their first movie together was Message from Space (1978) while their highest rated movie together was Kamen Rider: Eight Riders vs. Galaxy King (1980). They have not worked together since Kamen Rider Super-1: The Movie (1981). They are most known for their adventure films together.