The Kouga Clan (大黄牙, Dai Kouga) is a horse raiding clan situated in a rural area of the Northern Tenzan Plateau.
It is said that Kouga Clan was previously known as the Kouga Empire, which was built by Chagan Khan (チャガン・ハーン, Chagan.Hān). They were once the strongest nation in the world. They were just like Kou Empire with the ambition to unite the whole world under their name, but they failed and shrunk to being just a clan.
- The Kouga Clan is situated on the Northern Tenzan Plateau, which in our world would be Mongolia.
- The Kouga Empire is a reference to the Mongol Empire. Its founder Chagan Khan is based on Genghis Khan, or Chingis Khan.