From Wikipedia: No Longer Human (a e-a ae Ningen Shikkaku) is a Japanese novel by Osamu Dazai. Published after Run Melos and The Setting Sun, No Longer Human is considered Dazai's masterpiece and ranks as the second-best selling novel in Japan, behind Kokoro.

From Wikipedia: No Longer Human (a e-a ae Ningen Shikkaku) is a Japanese novel by Osamu Dazai. Published after Run Melos and The Setting Sun, No Longer Human is considered Dazai's masterpiece and ranks as the second-best selling novel in Japan, behind Kokoro.