No Longer Human is a 1948 Japanese novel by Osamu Dazai. It is considered Dazai's masterpiece and ranks as the second-best-selling novel ever in Japan, behind Natsume Sōseki's Kokoro. The literal translation of the title, discussed by Donald Keene in his preface to the English translation, is "Disqualified From Being Human". The novel, narrated in the first person, contains several elements which portray an autobiographical basis. The novel presents recurring themes in the author's life, including suicide, social alienation, and depression. Many believe the book to have been his will, as Dazai took his own life shortly after the last part of the book (which had appeared in serial form) was published.
As of January 1, 2019, the book is in the public domain.
Ningen Shikkaku was adapted to film in 2009, the 100th anniversary of Dazai's birth. The film was directed by Genjiro Arato, the producer responsible for the award-winning Zigeunerweisen in 1980. Filming started in July, and it was released on February 20, 2010. The film stars Toma Ikuta (24) as Ōba Yōzō, a young man who finds it hard to relate to the world around him, but masks this sense of alienation with a jovial demeanor. Still, his life spirals toward self-destruction. Actress Satomi Ishihara (22) plays one of the several women in his life, and the only one he marries. The film was marketed outside Japan under the title Fallen Angel.
A new film titled Ningen Shikkaku was released on September 13, 2019, starring Shun Oguri in the role of writer Osamu Dazai, following the story of Dazai's life. The movie is directed by photographer and film director Mika Ninagawa. The movie opened in 320 theaters, ranking 4th place in its first weekend.