[5] This experience provided inspiration for his most important novel, Taiyō no nai Machi (太陽のない街, "The Street without Sunlight"), which he began in 1928.

[5] He eventually found another printing job at a large company, and while working there began his literary career.

[5] He joined the Japan Proletarian Writers' League (日本プロレタリア作家同盟 Nihon Puroretaria Sakka Dōmei, also abbreviated "NALP") in February 1929.

[6] In October 1937 he requested his publisher withdraw Taiyō no nai Machi from print in light of the breakout of war with China.

[6] He joined the Communist Party of Japan in 1946, allowed the republication of Taiyō no nai Machi, and was welcomed back into the proletarian literary movement.