名古屋巨蛋
After The High-Lows ceased activity in November 2005, Mashima proposed forming a new band with Kōmoto. Due to an introduction from a recording engineer named Satoshi Kawaguchi, known from the time of The Blue Hearts, Kobayashi and Kirita joined the formation of The Cro-Magnons. The name of the band came after Mashima and Komoto saw The Rolling Stones perform live at the Nagoya Dome. Their first album had already been recorded and the band was tentatively named "Kuromaniyonzu".