How many movies have Saho Sasazawa and Yuu Tokui collaborated on?

They have worked on 3 movies together! Their first movie together was Taxi Driver's Mystery Diary 36 (2014) while their highest rated movie together was Taxi Driver's Mystery Diary 37 - Mystery of Double Homicides from Tokyo to Hamamatsu (2015). They have not worked together since Taxi Driver's Mystery Diary 38 (2015).