How many movies have Keiko Iwata and Yusuke Kubo collaborated on?

They have worked on 2 movies together! Their first movie together was Peacemaker Kurogane: Belief (2018) while their highest rated movie together was Re:ZERO -Starting Life in Another World- The Frozen Bond (2019). They have not worked together since Re:ZERO -Starting Life in Another World- The Frozen Bond (2019).