In real life, Dazai and his mistress Tomie drowned themselves shortly after Dazai finished penning No Longer Human.
Junji Ito launched a manga adaptation of the novel in Shogakukan’s Big Comic Original magazine in May 2017, and ended it on April 20.
The film will not adapt Dazai’s No Longer Human, but will instead be a fictional biographical account of Dazai’s life seen from the point of view of Dazai and three women: his wife, and two mistresses.
Shinchosha’s Weekly Comic Bunch and Monthly Comic @ Bunch magazines serialized a manga adaptation of the novel by Usamaru Furuya from February 2009 to April 2011.