How many movies have Mieko Hosoi and Miyuki Sawashiro collaborated on?

They have worked on 4 movies together! Their first movie together was Naruto Shippuden the Movie (2007) and was their highest rated movie together. They have not worked together since Fate/Grand Order the Movie: Divine Realm Of The Round Table: Camelot Paladin; Agateram (2021). They are most known for their fantasy films together.