Donten ni Warau Gaiden: Shukumei, Soutou no Fuuma
English title: Donten: Laughing Under the Clouds - Gaiden: Chapter 2 - The Tragedy of Fuuma Ninja Tribe
Japanese title: 曇天に笑う＜外伝＞ ～宿命、双頭の風魔～
Alternative titles: Cloudy Laugh Gaiden, Laughing Under the Clouds Gaiden
Type: Movie
Source: Manga
Episodes: 1
Status: Finished Airing
Aired: Jun 9, 2018
Duration: 1 hr
Rating: PG-13 - Teens 13 or older
Studios: Wit Studio
Producers: Production I.G, Shochiku, Blade, Kinoshita Management
Licensors: Eleven Arts
Genres: Action, Supernatural
Themes: Historical, Martial Arts

Fuuma ninja clan is a secret ninja tribe that is waiting for the "Orochi" (gigantic snake) to resurrect for generations. Shirasu and his twin brother Ichiu grew up in this viscous environment and this tells how they become the leaders of the clan.

(Source: Amazon Prime Video)