Casshan," "Mazinger Z," "Getter Robo" and "Devilman no Uta" were previously recorded as a six-minute marathon and independently released as the band's self-titled 1996 EP.

"Uchū Senkan Yamato," "Umi no Triton," "Great Mazinger," "Tatakae!

Polymar," "Tiger Mask," "Babel II" and "Taga Tame ni (Cyborg 009 theme)" were recorded as a separate marathon titled This is Animetal.

For instance, "Suki da Danguard Ace" uses the intro riff of Led Zeppelin's "Communication Breakdown."

The album cover's unnamed skeleton mascot is a parody of Iron Maiden's Eddie and Megadeth's Vic Rattlehead.