How many movies have Takenori Tsukuma and Tomo Sakurai collaborated on?

They have worked on 3 movies together! Their first movie together was Shakugan no Shana: The Movie (2007) and was their highest rated movie together. They have not worked together since Rurouni Kenshin: New Kyoto Arc: The Chirps of Light (2012). They are most known for their animation films together.