How many movies have Akira Ookuma and Shigeru Shibuya collaborated on?

They have worked on 3 movies together! Their first movie together was The Tale of the Ginormous Whale That Fell in Love with a Little Submarine (2004) while their highest rated movie together was Colorful (2010). They have not worked together since Nintama Rantarou Movie: Ninjutsu Gakuen Zenin Shutsudou! no Dan (2011). They are most known for their animation films together.