How many movies have Akira Shioji and Takanori Oya acted in together?

They have worked on 6 movies together! Their first movie together was Battles Without Honor and Humanity: Deadly Fight in Hiroshima (1973) while their highest rated movie together was The Decisive Power of Aikido (1975). They have not worked together since Sister Street Fighter: Fifth Level Fist (1976). They are most known for their crime films together.