The Amago clan is referred to as a governor-general of eleven provinces, but in fact, the clan governed only eastern Izumo Province (western Izumo was not completely ruled by the Amago clan, as demonstrated in the Rebellion by Okihisa ENYA), Oki Province and a part of Iwami Province and western Hoki Province, but other areas had different rulers at times.
11ヶ国の太守と形容されるが、実質上支配下に置けた勢力はあくまで東出雲（西出雲は塩冶興久の乱が起こったように、尼子氏の勢力は極めて不安定）・隠岐国・石見一部・西伯耆であり、他地域は流動的であった。