[DeepL Translation - needs review] Essays by Osamu Dazai, a novelist of the early Showa period who represented the "Muyori-ha" or "New Drama School" of doomed writers. First published in "Bungaku Tsushin" (Literature News) [1935]. It is a protest by Dazai against Kawabata Yasunari's review of "Douka no Hana" (Flower of the Clown) in the selection review for the first Akutagawa Award. Kawabata later warned Dazai not to be delusional or to infer evil from this text.
(Translator: DeepL)
I wasn't totally sure what to make of this on reading it - I definitely felt like I was missing some information. I looked into it and it does seem like Dazai and Kawabata had some history and a 'love hate' relationship. For context, Kawabata is another famous author of the era, probably best known for 雪国.
Some older writing typical of Aozora, but it doesn't have that much in terms of old kanji and no archaic kana spellings.