Yūji Koseki

was a Japanese ryūkōka, gunka, march, fight song and film score composer. His real name was also Yūji Koseki, but its kanji was 古關 勇治. For his contributions in music to baseball, he was inducted into the Japanese Baseball Hall of Fame in 2024.

Career Koseki entered Nippon Columbia in 1930. He composed Hanshin Tigers' song "Rokko Oroshi" in 1936 (for this, i His famous military song titled was released in 1937. Famous songs composed by him included "The Bells of Nagasaki" and "Mothra's song". Ichiro Fujiyama sang "The Bells of Nagasaki" in 1949. "Mothra's song", sung by The Peanuts, was used in the 1961 movie Mothra. "Olympic March" in 1964. He also arranged "Olympic Hymn" for Orchestra.

Filmography Music for films: Momotaro's Divine Sea Warriors (1945) Kane no naru oka: Dai san hen, kuro no maki (1949) Odoroki ikka (おどろき一家) (1949) The Bells of Nagasaki (1950) A Mother's Love (1950) Mothra (1961)