How many movies have Han Seung-ah and Seiki Tamura collaborated on?

They have worked on 3 movies together! Their first movie together was The Last: Naruto the Movie (2014) while their highest rated movie together was Boruto: Naruto the Movie (2015). They have not worked together since Mr. Osomatsu: The Soulful Takoyaki Party and the Legendary Sleepover (2023). They are most known for their animation films together.