Dazai Osamu was a prominent Japanese author born on June 19, 1909, in Aomori, Japan. He is best known for his novels and short stories that explore themes of existentialism, despair, and the human condition. His most famous works include No Longer Human and The Setting Sun, which reflect his struggles with mental health and societal alienation. Dazai's writing style is characterized by its introspective nature and emotional depth. He was part of the Buraiha literary movement, which focused on the darker aspects of life. Tragically, Dazai Osamu died by suicide on April 13, 1948, leaving behind a lasting legacy in Japanese literature.