period. In 1946, NHK revived their music program as "Radio Kayō" and it was later reformed as "Minna no Uta", but NHK was disinclined to mention its former history. 1945–1954: Postwar popularity Michiko Namiki's song sung by Michiko Namiki and Noboru Kirishima, airing in 1945 movie "Soyokaze", became popular. Haruo Oka also released hit songs such as his 1946 song and his 1948 song . Ichiro Fujiyama, who was falsely reported to have been killed in battle, returned to Japan in 1946. 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. Yuji Koseki composed and . "Nagasaki no Kane", based on Takashi Nagai's book The Bells of Nagasaki, was sung by Fujiyama in 1949. Fujiyama became the final singer of all singers at the 1st Kōhaku Uta Gassen with "Nagasaki no Kane" in 1951. Chiemi Eri debuted in 1952 and Izumi Yukimura debuted in 1953. Fujiyama moved to NHK in 1954 and returned to his original style―classical music. He went on to become a conductor for "Hotaru no Hikari" at the Kōhaku Uta Gassen. 1955–1963: Transformation of music New singers such as Hibari Misora, Hachiro Kasuga, Michiya Mihashi and Chiyoko Shimakura became popular when old singers became unpopular. The period between around 1955 and 1964 saw the popularity of "kayōkyoku". Around that time, Japanese composers went on to establish their own genres such as Toru Funamura and Minoru Endo's "Enka", Tadashi Yoshida's "Mood Kayō", and Hachidai Nakamura and Hiroshi Miyagawa's "Jazz". Masao Koga renounced his pre-war musical style, approaching Hibari Misora. The song "Otomisan" was made for being sung by Haruo Oka, but was eventually sung by Hachiro Kasuga and became a major hit in Japan in 1954. The single sold over one million copies. The song was composed by Masanobu Tokuchi, who came from the Ryukyu Islands. Kasuga's 1955 song "Wakare no Ipponsugi", composed by Funamura, also became a hit song. Funamura also composed Michiya Mihashi's 1955 song "Anoko Ga Naiteru Hatoba". Ryōkyōku singers such as