How many movies have Naoto Takenaka and Tōichirō Shiraishi collaborated on?

They have worked on 2 movies together! Their first movie together was Ninja Kids!!! (2011) while their highest rated movie together was Hara-Kiri: Death of a Samurai (2011). They have not worked together since Hara-Kiri: Death of a Samurai (2011).