When Fujiyama sang Western classic lied songs, those songs were called "kayōkyoku", but the term "kayōkyoku" went on to be used as another name of "ryūkōka" in NHK. At first, Koga was a good co-worker for Fujiyama but they moved apart from each other because Koga sought "Japanese" music. On the other hand, Yoshie Fujiwara drew a clear line between him and "ryūkōka" and established the Fujiwara Opera in 1934, launching the establishment of Japanese Opera. Baritone singer Taro Shoji's 1934 song also became popular, though he did not know Kunisada Chūji, the theme of the song.