After he was removed from the position of Kyushu Tandai, he was ordered to be a shugo for half of Suruga Province and divided and ruled the province with Yasunori IMAGAWA, his nephew.
了俊は九州探題を罷免された後、駿河国(静岡県)半国の守護を命じられ、甥の今川泰範と分割統治することとなった。