How many movies have Jun Ōsugi and Kōichi Aihara acted in together?

They have worked on 10 movies together! Their first movie together was Akado Suzunosuke and the Vacuum Slash of the Asuka School (1957) while their highest rated movie together was The Ghost-Cat Cursed Wall (1958). They have not worked together since The Tale of Zatoichi Continues (1962).