A Sumo Wrestler's Tail (2010)
A Sumo Wrestler's Tail is a Japanese animated fantasy short film directed by Akihiko Yamashita and written by Hayao Miyazaki made for the Studio Ghibli Museum. It premiered at the museum in 2010.
More at Wikipedia.
Director: Akihiko Yamashita
Distributor: Ghibli Museum
Release date: January 1, 2010