- He was a Japanese playwright, novelist and poet.
- After his father, the headmaster of a primary school, committed suicide in 1897, Kume Masao lived with his mother in Kōriyama, in the Fukushima prefecture.
- He began writing haikus and then turned to theatre before his graduation from Tokyo Imperial University. He notably wrote the play “The Milkman’s Younger Brother” (1914).
- At the university Department of Literature, he was the disciple of Natsume Souseki, alongside Akutagawa Ryuunosuke and Kikuchi Kan. The three of them belonged to school literary journal Shinshichō (“New Currents of Thought”).
- He wrote some novels too, such as “My Father's Death”, “Notes of a Student Examinee” (1916), “The Tiger” (1918) and “Shipwreck” (1922).
- Kume suffered from high blood pressure much of his life, and died of a cerebral haemorrhage at the age of 61.