The Kyōgoku clan were a Japanese daimyō clan which rose to prominence during the Sengoku and Edo periods. The clan descend from the Uda Genji through the Sasaki clan. The name derives from the Kyōgoku quarter of Kyoto during the Heian period.

Ōmi Province was a province of Japan, which today comprises Shiga Prefecture. It was one of the provinces that made up the Tōsandō circuit. Its nickname is Gōshū (江州). Under the Engishiki classification system, Ōmi was ranked as one of the 13 "great countries" (大国) in terms of importance, and one of the "near countries" (近国) in terms of distance from the capital.