The super robot anime franchise Mazinger Z will get its first Blu-ray Disc release in Japan on October 21 to celebrate the anime's 40th anniversary. The Mazinger The Movie Blu-ray 1973-1976 release will include UFO Robo Grendizer's predecessor Uchuu Enban Dai-Senso.
Souce from animeanime.jp There's more detailed info there but its in Japanese so I can't translate ._. It seems more like a collection of the movies? If someone can translate that would help a lot. Thanks in advance.