How many movies have Yoko Taro and Yui Ishikawa collaborated on?

They have worked on 4 movies together! Their first movie together was NieR Music Concert & Talk Live (2016) while their highest rated movie together was NieR Music Concert: The Memories of Puppets (2017). They have not worked together since NieR:Orchestra Concert 12018 (2019). They are most known for their music films together.