In the spring of 1948, he was working on a novelette scheduled to be serialized in the Asahi Shimbun newspaper, titled Guddo bai (Goodbye). On 13 June 1948, Dazai and Tomie finally succeeded in killing themselves, drowning in the rain-swollen Tamagawa Canal near his house. Their bodies were not discovered until June 19, which by eerie coincidence was his 39th birthday.

グリム童話のラプンツェルに設定が似た物語を、５人の兄弟姉妹が、正月に連作するという話。On new year's day 5 brothers & sisters write a story similar to Grimm Brothers' Rapunzel.