Oyama Tomomasa

Oyama Tomomasa (小山 朝政, 1155 – May 15, 1238) was a Japanese samurai lord and gokenin of the late Heian and early Kamakura period. He served as shugo of Shimotsuke Province and Harima Province. He was an influential gokenin during the founding of the Kamakura shogunate. He was the 2nd head of the Oyama clan. He was also known as Oyama Koshirō.

Biography Tomomasa was born in 1155, in Shimotsuke Province, the eldest son of his father, Oyama Masamitsu, and his mother, Samukawa-no-ama. and had founded the Oyama clan at Oyama Manor in Tsuga, Shimotsuke Province. He descended from the Fujiwara clan through Fujiwara no Hidesato. His mother was the wet nurse of Minamoto no Yoritomo.

He accompanied Yoritomo during his entry to Kyoto in 1190, and was appointed Lieutenant of the Right Division of Outer Palace Guards.

He served as shugo of Shimotsuke Province and Harima Province.

Tomomasa died on May 15, 1238, at the age of 84.

In popular culture

TV series

Kusa Moeru (1979) NHK Taiga drama, Oyama Tomomasa portrayed by Minoru Ōkōchi The 13 Lords of the Shogun (2022) NHK Taiga drama, Oyama Tomomasa portrayed by Atsushi Nakamura

Gallery