Donten: Laughing Under the Clouds - Gaiden: Chapter 1 - One Year After the Battle
曇天に笑う<外伝>~決別、犲の誓い~ (original)
Three brothers who guarded their shrine against a legendary snake find out about a plot to make the monster live again to finish humanity.
Starring Yuichi Nakamura, Yuki Kaji, Tsubasa Yonaga, Takahiro Sakurai, Mamiko Noto, Kenichi Suzumura, Kohsuke Toriumi, Rina Sato, Yuki Fujiwara, Hiroki Yasumoto
Watch "Donten: Laughing Under the Clouds - Gaiden: Chapter 1 - One Year After the Battle" from streaming services Imdb TV (Prime), Imdb TV released in 2017. It's a action & adventure and animation movie, and has a rating of 6.3 out of 10 from Imdb which is usually fine for this kind of movie, and is currently available to watch for free.