How many movies have LiSA and Reki Kawahara collaborated on?

They have worked on 4 movies together! Their first movie together was Sword Art Online: Extra Edition (2013) while their highest rated movie together was Sword Art Online the Movie – Progressive – Aria of a Starless Night (2021). They have not worked together since Sword Art Online -FULLDIVE- (2022). They are most known for their fantasy films together.