Osamu Dazai (1909-1948) was a twentieth-century Japanese novelist. His many published works include The Setting Sun, Self Portraits, Schoolgirl, and Return to Tsugaru: Travels of a Purple Tramp.
From the perspective of his wife "Satchan" poet of the Imperial University that's the second son of the original Baron, it has been spelled out the words and actions of Otani and the people around him.