In 998, Korehira was in the post of Governor of Shimotsuke Province as Kokushi of Yonin (a provincial governor residing in the capital); however, he fought at Kamikori (the precincts of a Shinto shrine) in Ise Province against TAIRA no Muneyori, who belonged to the same clan as Korehira and was also Korehira's second cousin.
長徳4年（998年）、維衡は遥任の国司として下野守在任中であったが、伊勢国神郡において同族の平致頼（維衡の又従兄弟）と合戦を繰り広げた。