In 1093, kokushi (provincial governor) of Dewa Province, Saneakira (his last name was unknown but in the "Gonijo Moromichi ki" (Diary of FUJIWARA no Moromichi) Dewa no kami (the governor of Dewa Province) of that year is said to be MINAMOTO no Saneakira), was attacked and killed by TAIRA no Morotae and the son TAIRA no Morosue.
寛治7年（1093年）、出羽国国司信明（姓不詳とされてきたが『後二条師通記』に同年の出羽守源信明とある）が平師妙と子の平師季に襲撃され殺害された。