How many movies have Kōichi Mizuhara and Ryūtarō Gomi acted in together?

They have worked on 13 movies together! Their first movie together was Sleepy Eyes of Death 2: Sword of Adventure (1964) while their highest rated movie together was Secret Assignment (1967). They have not worked together since The Saga of Tanegashima (1968). They are most known for their action films together.