Nikaidō Yukimasa

Nikaidō Yukimasa (c. 1140 – after 1219) was a court official and chief civilian administrator of the early Kamakura shogunate, ancestor of the Nikaidō house. Entering Yoritomo's service around 1184, he served in the new records office under Ōe no Hiromoto.

In 1191 he became deputy head of the Mandokoro, rising to co-head in 1193, and in 1199 he was named among the thirteen councilors governing after Yoritomo's death. His signatures vanish from documents under Sanetomo, and his death date is unrecorded.