How many movies have Akira Nishioka and Keita Amemiya collaborated on?

They have worked on 3 movies together! Their first movie together was GARO Side Story: The Tougen Flute (2013) while their highest rated movie together was GARO -Gold Storm- Sho (2015). They have not worked together since GARO: Fang of God (2018). They are most known for their horror films together.