Koshu

Koshu (広州) is a region of the Hino Country. It is ruled by the Musyogatake Clan.

Description
Koshu is part of the Hino Country mainland and is near the island region of Goshu.

When Yosuga Musyogatake is 17 years old, a plague breaks out in both Koshu and Goshu. As the two strongest of their respective regions, Yosuga and Ryuya Ryudo are asked to acquire the Tengentsu in order to locate the special herb that will cure the sick. Ryuya volunteers to sacrifice all of his magic power to attain the eye and ultimately locates the herb, saving the people of both regions.

Trivia

 * The region's name contains the kanji for "wide" (広) and "region" (州).