Chiba Tanemasa

Chiba Tanemasa (1141–1203), fourth head of the Chiba clan, was the eldest son of Chiba Tsunetane, commonly called Shinsuke. In 1180 he and his father answered Minamoto no Yoritomo's rising, and in April 1181 he was named among the eleven warriors guarding Yoritomo's own quarters.

He fought in the Ōshū campaign of 1189 and helped crush the rebel Ōkawa Kanetō the following year. He died in 1203, traditionally aged sixty-three, and was succeeded by his son Naritane.