How many movies have Natsuki Sato and Tomomi Kasai acted in together?

They have worked on 8 movies together! Their first movie together was Himawarigumi 1st Stage - Boku no Taiyou (2008) and was their highest rated movie together. They have not worked together since 「見逃した君たちへ」チームB 5th Stage「シアターの女神」公演 (2011). They are most known for their music films together.