How many movies have Kaori Seki and Tomokazu Seki collaborated on?

They have worked on 4 movies together! Their first movie together was Fate/stay night: Heaven's Feel II. Lost Butterfly (2019) while their highest rated movie together was Jujutsu Kaisen 0 (2021). They have not worked together since Sword Art Online the Movie – Progressive – Scherzo of Deep Night (2022). They are most known for their fantasy films together.