There is a description in the chapter of 'Dazaifu-ochi' of "Heike Monogatari" (The tale of the Heike) as follows: when the Taira clan took refuge in Kyushu after being exiled from Kyoto, they were expelled by Koreyoshi OGATA who had left the Taira clan and switched to the Minamoto clan.
『平家物語』「大宰府落」で、都を追われた平氏一門が九州へ逃れて来ると、平家から源氏方に転じた緒方惟栄に追い払らわれた。