Sukemichi SUDO, whose other name was 'FUJIWARA no Sukemichi,' was 13 years old at this time (November 1087) and if he had followed Yoshiie since he went down to the Mutsu Province, he should have been still 9 years old (which corresponded to the present 8 years old).
「藤原の資道」こと首藤資通はこのとき（1087年11月）13歳、義家の陸奥下向の時から従っていたとすればまだ9歳（今で言う8歳）。