How many movies have Akari and Koji Shiraishi collaborated on?

They have worked on 2 movies together! Their first movie together was Senritsu Kaiki File Kowasugi! The Most Terrifying Movie in History (2014) while their highest rated movie together was Senritsu Kaiki File Kowasugi! Final Chapter (2015). They have not worked together since Senritsu Kaiki File Kowasugi! Final Chapter (2015).