How many movies have Mikiho Niwa and Motoi Sasaki collaborated on?

They have worked on 4 movies together! Their first movie together was Samurai Sentai Shinkenger vs. Go-Onger: Silver Screen BANG!! (2010) while their highest rated movie together was Gokaiger Goseiger Super Sentai 199 Hero Great Battle (2011). They have not worked together since Come Back! Tensou Sentai Goseiger: Last Epic - The Gosei Angels are National Idols?! (2011). They are most known for their adventure films together.