However there is no source which supports the above tradition, and there is a theory that the old mansion of the Suga clan is his birthplace, but there was no relationship between the Suga clan and Michizane.
ただし、それを裏付けるような史料はなく、道真とは関係のない菅家の旧館を道真の誕生所と誤ったものという説もある。