The book examines the causes and course of the September 1905 unrest in Japan; their nature, main driving forces and reasons for defeat are analyzed. In conclusion, an assessment was made of the September unrest of 1905 in the history of the struggle of the Japanese people against the reaction. The study is based on a wide range of sources, literature and press of those years in Russian, Japanese and Western European languages. The book is designed for scientists and students of historical faculties of universities and pedagogical institutes.