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The comment by josephting got it mostly right. Ga-Rei and Tokyo ESP are both manga by Segawa Hajime (Ga-Rei: Zero also shares script writer Takayama Katsuhiko with the Tokyo ESP anime). Showing Kagura and Yomi (and later two other characters from Ga:Rei Zero) was likely intended as a throwback reference to Ga-Rei. I guess from a practical standpoint, it ...


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I don't know about the specific case of Tokyo ESP, but it's far from uncommon for anime to have references to American popular culture. For example, there was Nerima Daikon Brothers, which was vaguely influenced by The Blues Brothers and contained the weird Michael Jackson parody Yukel Hakushon. Excel Saga and Magical Shopping Arcade Abenobashi were also ...


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