After Yoshiaki was expelled from Kyoto by Nobunaga and came under the patronage of Mori clan in Tomo, Bingo Province, he appointed Terumoto Mori as vice shogun and tried to re-establish Muromachi bakufu in Tomo.
義昭が信長によって京都を追放され、備後国の鞆にて毛利氏の庇護に入ると、義昭は毛利輝元を副将軍に任じ、鞆において幕府の再建を目指した。