How many movies have Seiya Satō and Takashi Hio acted in together?

They have worked on 15 movies together! Their first movie together was The Thinking Leaf (1962) while their highest rated movie together was Japan Organized Crime Boss (1969). They have not worked together since Truck Rascals VI: Momojiro, The One and Only (1977). They are most known for their action films together.