How many movies have Haruo Nakayama and Kunio Kaga collaborated on?

They have worked on 21 movies together! Their first movie together was 旗本退屈男　どくろ屋敷 (1954) while their highest rated movie together was Lord Tokugawa Ieyasu (1965). They have not worked together since A History of the Japanese Underworld (1968). They are most known for their drama films together.