How many movies have Eitarō Ozawa and Shigeru Kōyama acted in together?

They have worked on 10 movies together! Their first movie together was Gunman's Alley (1961) while their highest rated movie together was Willful Murder (1981). They have not worked together since The Yoshida School (1983). They are most known for their drama films together.

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Infrastructure Minister Osanai
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Shingo Shogaki