How many movies have Hiroshi Yamate and Koji Arima acted in together?

They have worked on 4 movies together! Their first movie together was 旗本退屈男 謎の幽霊船 (1956) while their highest rated movie together was Torawakamaru, the Koga Ninja (1957). They have not worked together since Torawakamaru, the Koga Ninja (1957).