Osamu Dazai (19 ga Yuni, 1909 - 13 ga Yuni, 1948), marubucin Japan ne. An haifi Dazai Tsushima Shūji A Aomori, arewa maso gabashin Japan. An fi saninsa da litattafansa The Setting Sun (1947) da No Longer Human (1948). Dazai ya rubuta litattafai da dama game da ma'anar rayuwa, rashin fata da shaye-shaye bisa rayuwarsa ta ƙashin kansa. Dazai ya kasance marubucin tsakanin ɗaliban kwalejin Japan . A ranar 13 ga Yuni 1948, ya kashe kansa tare da ƙaunatacciyar mace. An gano gawarsa a ranar 19 ga Yuni, ranar haihuwarsa, a wannan shekarar. Gary D. Allinson, The Columbia Guide to Modern Japanese History (New York: Columbia University Press, 1999), p. 188 Mamoru Iga, The Thorn in the Chrysanthemum: Suicide and Economic Success in Modern Japan (Berkeley: University of California Press, 1986), p. 85