Space Battleship YAMATO: TV series Part 1: vol1 - 7 (1974)

Space Battleship Yamato (1974–1975) follows a serialized 26-episode story—often divided into two parts in international releases—detailing a desperate mission to save Earth from extinction. 

In the year 2199, Earth is under siege by an alien race known as the Gamilas (Gamilons). Their relentless "planet bombs" have rendered the surface uninhabitable and contaminated with intense radiation, forcing the last of humanity to live in underground cities. 

All 7 discs in this series, 5 are still sealed.