After Yoshiaki and Nobunaga were opposed to each other, Yoshiaki asked Ieyasu TOKUGAWA, an ally of Nobunaga, to become the vice shogun in order to win him to Yoshiaki's side, but it is said that Ieyasu declined this offer.
その後、義昭と信長が対立すると、義昭は信長の同盟者である徳川家康を味方に取り込むために副将軍への就任を要請したが、家康は応じなかったとされる。