Emperor Usoku was the successor of Emperor Kisu to the Canthan throne. During his reign, he spent millions in gold to arm his troops and defeat the warring Luxon and Kurzick factions. Usoku also unified the Canthan nation behind a strong national identity and began to remove all non-humans from Cantha. Canthans who disagreed with Usoku's views were forced to leave their homeland for either Tyria or Elona.
- Usoku is the Japanese word for right hand.
- Usoku's isolationist approach to Cantha is similar to Japan's isolationism in the early 1600s in which Tokugawa Ieyasu obtained power by incorporating the independant military leaders into the bakufu and eliminating foreign contact with the West.