Shingeki no Kyotou
English name: Attack on Skytree
Genres: Action, Fantasy
Type: Movie, Episodes: 1
Aired: Apr 10, 2017
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
A special anime featuring a battle against the Colossal Titan screened at the Tokyo Skytree.

In the short, the characters from Shingeki no Kyojin are part of the Sky Survey Corps, protecting the Wall Skytree, a section of the walled city that contains the Skytree. The Sky Survey Corps find that the Wall Skytree is under attack by an army of titans, including a giant 350 meter-class titan that has suddenly appeared next to the Skytree and remains motionless.

(Source: Anime Now!)