How many movies have Hiroshi Koujina and Noriyasu Yamauchi collaborated on?

They have worked on 3 movies together! Their first movie together was Roots Search (1986) while their highest rated movie together was Escaflowne: The Movie (2000). They have not worked together since Escaflowne: The Movie (2000). They are most known for their animation films together.

Escaflowne: The Movie (2000)

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Key Animation
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Key Animation

City Hunter: .357 Magnum (1989)

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Animation Director
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Key Animation
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Key Animation

Roots Search (1986)

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Key Animation
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Key Animation