How many movies have Hideki Hamasu and Kouichi Arai collaborated on?

They have worked on 11 movies together! Their first movie together was Akira (1988) while their highest rated movie together was Perfect Blue (1998). They have not worked together since A Letter to Momo (2012). They are most known for their animation films together.

A Letter to Momo (2012)

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Key Animation
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Key Animation

Legend of the Millennium Dragon (2011)

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Key Animation
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Key Animation

One Piece: Baron Omatsuri and the Secret Island (2005)

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Key Animation
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Key Animation

Millennium Actress (2002)

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Animation Director
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Key Animation
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Key Animation

Digimon: The Movie (2000)

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Key Animation
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Key Animation

Perfect Blue (1998)

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Animation Director
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Key Animation
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Character Designer

Ghost in the Shell (1995)

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Key Animation
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Key Animation

Sailor Moon R: The Movie (1993)

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Key Animation
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Key Animation

Crying Freeman 2: Shades of Death, Part 1 (1989)

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Animation Director
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Character Designer
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Animation Director

Crying Freeman 1: Portrait of a Killer (1988)

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Animation Director
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Character Designer
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Key Animation
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Animation Director
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Key Animation

Akira (1988)

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Key Animation
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Key Animation