How many movies have Satoshi Sakai and Tooru Imanishi collaborated on?

They have worked on 3 movies together! Their first movie together was Girls und Panzer der Film (2015) while their highest rated movie together was Kabaneri of the Iron Fortress: Life That Burns (2017). They have not worked together since Kabaneri of the Iron Fortress: The Battle of Unato (2019). They are most known for their action films together.