Osamu Dazai, born as Shūji Tsushima, was a prominent Japanese novelist known for his unique contributions to 20th-century Japanese literature. His works, often marked by their semi-autobiographical style and critical examination of postwar Japan, resonate with readers for their deep exploration of human nature and social conformity.

Some of Dazai's most celebrated works include The Setting Sun (Shayō) and No Longer Human (Ningen Shikkaku), which have been hailed as modern-day classics in Japan. These narratives are compelling for their stark portrayal of personal turmoil and social alienation, themes that mirror Dazai's own troubled life.

Despite his passing, Dazai's legacy as a literary figure has only grown, with his works gaining followers both in Japan and internationally. His final work, No Longer Human, remains particularly popular, having been adapted into various formats such as film, anime, and manga. Dazai's influence and the pertinence of his themes continue to be felt decades after his death.