How many movies have Shinobu Ookouchi and Yuki Akimoto collaborated on?

They have worked on 3 movies together! Their first movie together was Air: The Motion Picture (2005) while their highest rated movie together was Clannad: The Motion Picture (2007). They have not worked together since For Whom the Alchemist Exists (2019). They are most known for their animation films together.

For Whom the Alchemist Exists (2019)

Crew
Animation Director
Crew
Color Designer

Clannad: The Motion Picture (2007)

Crew
Key Animation
Crew
Color Assistant

Air: The Motion Picture (2005)

Crew
Key Animation
Crew
Digital Colorist