In 1575, he was found by Ieyasu TOKUGAWA and ordered to revert back to his family name Ii, so he changed his name from Toramatsu and renamed himself Manchiyo II.
天正3年（1575年）、徳川家康に見出され、井伊の姓に復帰を命じられるとともに虎松を万千代と改めて、井伊万千代と名乗るようになる。