 Essays by writers such as Christian socialist Kagawa Toyohiko, Marxist Kawakami Hajime, and Yamakawa Hitoshi were published and helped the magazine gain popularity.It also published Shiga Naoya's novel "A Dark Night's Passing" (1921–37), Riichi Yokomitsu's "Shanghai" (1929-1931), and Jun'ichirō Tanizaki's "Quicksand" (1928–30).Another popular general-interest magazine "Chūōkōron" (中央公論) was established before "Kaizō," but sales of "Kaizō" overtook it despite its radical content.