Tōson Shimazaki was the pen-name of Haruki Shimazaki, a Japanese writer active in the Meiji, Taishō and early Shōwa periods of Japan. He began his career as a Romantic poet, but went on to establish himself as a major proponent of Japanese Naturalism. The historical novel Before the Dawn (1929-1935), about the fall of the Tokugawa shogunate, is his most popular work.

Before the Dawn is a historical novel by the Japanese writer Tōson Shimazaki. It was originally published in Chūō Kōron in 1929 as a serial work. Shinchosha later published the work in novel form, with the first part being released in January 1932 and the second part being released in November 1935.