How many movies have Hiroshi Watari and Naruhisa Arakawa collaborated on?

They have worked on 2 movies together! Their first movie together was Space Sheriff Sharivan: NEXT GENERATION (2014) while their highest rated movie together was Bakuryū Sentai Abarenjā 20th: Yurusa Rezaru Abare (2023). They have not worked together since Bakuryū Sentai Abarenjā 20th: Yurusa Rezaru Abare (2023).