How many movies have Tsunehiko Watase and Yōko Koizumi acted in together?

They have worked on 5 movies together! Their first movie together was The Rapacious Jailbreaker (1974) while their highest rated movie together was The Decisive Power of Aikido (1975). They have not worked together since Legend of Dinosaurs and Monster Birds (1977). They are most known for their action films together.