How many movies have Kōji Takada and Kōsaku Yamashita collaborated on?

They have worked on 15 movies together! Their first movie together was Seven Knights Pt. 1 (1961) while their highest rated movie together was Showdown of Men 4: Tetsu, the White Tiger (1968). They have not worked together since Yakuza Ladies Revisited 2 (1993). They are most known for their drama films together.