How many movies have Hiroyuki Horiuchi and Hisashi Saito collaborated on?

They have worked on 4 movies together! Their first movie together was Digimon Adventure 02: Hurricane Touchdown! The Golden Digimentals (2000) while their highest rated movie together was Naruto the Movie: Ninja Clash in the Land of Snow (2004). They have not worked together since King of Thorn (2010). They are most known for their animation films together.