The theatrical features of Mazinger Z, Great Mazinger, Getter Robo and UFO Robo Grendizer were released at the Toei Manga Festival from 1973 to 1976. In 2022, the 50th anniversary of Mazinger Z, those films are now available in a 4K remastered box set! 5K scanning & 4K HDR remastering vividly reproduces the information on the original 35 mm negative film! Contains 7 original theatrical films in ULTRA HD Blu-ray discs and standard Blu-ray discs. In addition to the original sound, pseudo 5.1ch sound is also included (except for some films). *The 5.1ch sound is artificially created from existing sound sources.