Osamu Dazai was a Japanese novelist, widely regarded as one of the most significant literary figures of 20th-century Japan. Born in Kanagi, Aomori Prefecture, Dazai is best known for his works that explore themes of alienation, self-destruction, and the search for meaning in a rapidly modernizing society. His deeply personal and often semi-autobiographical narratives reflect the turmoil of his own life, marked by repeated suicide attempts and a profound sense of existential despair. Today, his novels No Longer Human (1948) and The Setting Sun (1947) stand as classics of modern Japanese literature. Dazai's work is characterized by its confessional style, blending fiction and autobiography to the point where the boundaries between the two become blurred. His writing often depicts disillusioned and self-destructive protagonists, mirroring his own struggles with depression and addiction. In The Setting Sun, Dazai portrays the decline of the Japanese aristocracy in the aftermath of World War II, capturing a nation in moral and social transition. No Longer Human, considered his masterpiece, is a haunting account of a man incapable of conforming to societal norms, descending into isolation and despair-a reflection of Dazai's own inner turmoil. Dazai's work resonated deeply with postwar Japan, a society grappling with the collapse of its traditional values and the trauma of defeat. His candid exploration of human weakness, self-doubt, and alienation spoke to a generation struggling to find meaning in a changing world. His style, marked by irony, humor, and pathos, has influenced countless Japanese authors, including Yukio Mishima and Haruki Murakami. Unlike many of his contemporaries, Dazai's appeal endures strongly among younger readers, who find in his works an intimate reflection of personal insecurity and existential struggle. Internationally, his novels have gained recognition for their universal themes, and translations have introduced his voice to readers around the world.