The name of Yukinari first appeared in Article August 24 of 1184 in "Azuma Kagami" (The Mirror of the East; a chronicle of the early history of the Kamakura bakufu [Japanese feudal government headed by a shogun]) as a muneage bugyo (ridgepole-raising shogunate administrator) of a newly-built Kumonjo (an administration office) along with MIYOSHI no Yasunobu.
行政の『吾妻鏡』での初見は1184年（元暦元年）8月24日条であり、新造の公文所棟上げの奉行として三善康信とともに登場する。