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Tag, known in Japan as Real Onigokko (Japanese: リアル鬼ごっこ, Hepburn: Riaru Onigokko), is a 2015 Japanese action horror film directed by Sion Sono and inspired by the title of the novel Riaru Onigokko by Yusuke Yamada. It was released in Japan on July 11, 2015. The film's theme song, "Real Onigokko", was written and performed for the movie by the rock band Glim Spanky.