Ryuko Kawaji (川路 柳虹, Kawaji Ryūkō; 1 October 1888 - 9 June 1959) was the pen-name of Kawaki Makoto, a Japanese poet and literary critic active during the Shōwa period of Japan. His Dharma name was Onyōin Metsuyo Chitoku Ryūkō Daikoji (温容院滅与知徳柳虹大居士).
Source: “Ryuko Kawaji”, English Wikipedia (CC BY-SA 4.0), excerpt