How many movies have Mitsutaka Hirota and Naru Kawamoto collaborated on?

They have worked on 3 movies together! Their first movie together was The Prince of Tennis: Showdown in England's Tennis Fortress (2011) and was their highest rated movie together. They have not worked together since Tennis no Ouji-sama Best Games!! Tezuka vs Atobe (2018). They are most known for their animation films together.