Arima Sumiyo

Arima Sumiyo was a head of the Hizen-Arima clan, a warrior family of Hizen Province in Kyushu. In the Northern and Southern Courts wars the clan followed the Kikuchi and the Shoni.

In 1353 Sumiyo invited the Soto Zen master Daichi Sokei, who had studied in Yuan China and enjoyed the Kikuchi's patronage, to Kazusa in southern Hizen; there Daichi founded Suigetsusan Entsu-ji, where he died in 1367. Sumiyo was succeeded as clan head by his son Arima Mitsuzumi.