How many movies have Shigeru Nishiyama and Takeshi Sanada collaborated on?

They have worked on 4 movies together! Their first movie together was The Girl Who Leapt Through Time (2006) while their highest rated movie together was Tamayura: Graduation Photo Part 3 - Akogare (2015). They have not worked together since Tamayura: Graduation Photo Part 3 - Akogare (2015). They are most known for their animation films together.