How many movies have Eiichi Yamada and Saburō Bōya collaborated on?

They have worked on 8 movies together! Their first movie together was The Tattooed Magistrate: Fallen Flowers Showdown Volume (1950) and was their highest rated movie together. They have not worked together since Hibari no san'yaku: Kei tsuya yuki no jôhenge (1957).