Yamato yo Towa ni
English title: Be Forever Yamato
Japanese title: ヤマトよ永遠に
Alternative titles: Yamato to Eternity, Yamato yo Eien ni
Type: Movie
Source: Original
Episodes: 1
Status: Finished Airing
Aired: Aug 2, 1980
Duration: 2 hr 28 min
Rating: PG-13 - Teens 13 or older
Studios: Toei Animation
Genres: Action, Adventure, Drama, Sci-Fi
Themes: Adult Cast, Military, Space

The Black Nebula Empire attacks Earth and threatens to blow up the planet with a bomb they placed on Earth if counter attacked. Earths hopes rest on the Yamato crew as they go to the Black Nebula Planet and try to find a way to difuse the bomb before it's too late. 

(Source: ANN)