At the time, there was a lot of speculation about the incident, with theories of forced suicide by Tomie. Keikichi Nakahata, a kimono merchant who frequented the young Tsushima family, was shown the scene of the water ingress by a detective from the Mitaka police station. He speculated that "Dazai was asked to die, and he simply agreed, but just before his death, he suddenly felt an obsession with life".