Ryoichi Hattori, who moved to Shanghai in 1944, contributed to advancing Japanese "poppusu" music after the war. Shizuko Kasagi's 1947 song "Tokyo Boogie-Woogie", composed by Hattori, became popular. Hattori also composed Ichimaru's 1949 song "Shamisen Boogie-Woogie". Around that time, Hibari Misora became known as an impersonator of Kasagi. She made her debut with song "Kappa Boogie-Woogie" in 1949. Hattori's composed song , which was sung by Ichiro Fujiyama and Mitsue Nara, became a major hit in the early post-war years in Japan.