How many movies have Nenji Kobayashi and Osamu Yamauchi acted in together?

They have worked on 2 movies together! Their first movie together was Gambler's World (1967) while their highest rated movie together was Yakuza Wolf 2: Extend My Condolences (1972). They have not worked together since Yakuza Wolf 2: Extend My Condolences (1972).