Ikuma Arishima

Ikuma Arishima (有島 生馬, Arishima Ikuma; November 26, 1882 – September 15, 1974) was the pen-name of Arishima Mibuma, a Japanese novelist and painter active in the Taishō and Shōwa period. He also used Utosei and then Jugatsutei as alternative pen names.

Source: “Ikuma Arishima”, English Wikipedia (CC BY-SA 4.0), excerpt