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

They have worked on 7 movies together! Their first movie together was Digimon Adventure 02: Hurricane Touchdown! The Golden Digimentals (2000) while their highest rated movie together was Giovanni's Island (2014). They have not worked together since The Wonderland (2019). They are most known for their animation films together.

The Wonderland (2019)

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Animation Director
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Key Animation
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Key Animation
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Animation Director

Giovanni's Island (2014)

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Key Animation
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Key Animation

A Letter to Momo (2012)

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Key Animation
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Key Animation

The Sky Crawlers (2008)

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Key Animation
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Key Animation

Fullmetal Alchemist the Movie: Conqueror of Shamballa (2005)

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Key Animation
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Key Animation

Naruto the Movie: Ninja Clash in the Land of Snow (2004)

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Key Animation
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Key Animation

Digimon Adventure 02: Hurricane Touchdown! The Golden Digimentals (2000)

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Key Animation
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Key Animation