Anarchism in Japan began to emerge in the late 19th and early 20th centuries, as Western anarchist literature began to be translated into Japanese. It existed throughout the 20th century in various forms, despite repression by the state that became particularly harsh during the two world wars, and it reached its height in the 1920s with organisations such as Kokuren and Zenkoku Jiren.

Kōtoku Denjirō , better known by the pen name Kōtoku Shūsui , was a Japanese socialist and anarchist who played a leading role in introducing anarchism to Japan in the early 20th century. Historian John Crump described him as "the most famous socialist in Japan".