Kiyomitsu did not participate in the strifes in central government, such as the Hogen War and Heiji War in which the Genji clan was involved, but built his strength in Kai Province.
清光は保元の乱や平治の乱など源氏の一族も関わっている中央の争乱には参加せず、甲斐国での勢力拡大に務めた。