How many movies have Hideki Takahashi and Toshihisa Kaiya collaborated on?

They have worked on 3 movies together! Their first movie together was Mind Game (2004) while their highest rated movie together was Professor Layton and the Eternal Diva (2009). They have not worked together since Professor Layton and the Eternal Diva (2009). They are most known for their animation films together.

Professor Layton and the Eternal Diva (2009)

Crew
Animation Director
Crew
Key Animation

Tales of Vesperia: The First Strike (2009)

Crew
Key Animation
Crew
Animation Director

Mind Game (2004)

Crew
Key Animation
Crew
Key Animation