However, it is only in the family tree made out in Mutsu Province that refers to the grant of Kokubun-no-sho (国分荘) to Tanemichi, and some records show his activities in Shimousa even after the Battle of Oshu, as well as the existence of his descendants there.
ただし、国分胤通が陸奥国国分荘を与えられたというのは陸奥国側の系図にだけ見えることで、奥州合戦後に下総で胤通が活動した記録があり、子孫も残している。