How many movies have Kaori Saito and Mamiko Nakanishi collaborated on?

They have worked on 5 movies together! Their first movie together was Chocolate Underground the Movie (2009) while their highest rated movie together was Donten: Laughing Under the Clouds - Gaiden: Chapter 2 - The Tragedy of Fuuma Ninja Tribe (2018). They have not worked together since Hula Fulla Dance (2021). They are most known for their animation films together.

Hula Fulla Dance (2021)

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Key Animation
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Key Animation

Love Live! Sunshine!! The School Idol Movie Over the Rainbow (2019)

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Donten: Laughing Under the Clouds - Gaiden: Chapter 2 - The Tragedy of Fuuma Ninja Tribe (2018)

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Key Animation
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Eden of the East Movie I: The King of Eden (2009)

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Chocolate Underground the Movie (2009)

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Key Animation
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Key Animation