Therefore, the reason for Yoshichika's assignment as Governor of Tsushima Province was to push Kawachi-Genji whose home ground was in Kawachi Province and who had power in Togoku (eastern part of Japan, particularly Kanto region) into Saigoku (western part of Japan [esp. Kyushu, but ranging as far east as Kinki]) as Kokushi (provincial governor) and to expect their failure because they were not familiar with the Saigoku region.
そのため義親が対馬守に任じられたのも、都に近い河内国を本拠地とし、東国を傘下にした河内源氏を、勝手の異なる西国の国司とすることで失敗を期待したものと思われる。