In particular, the feud between Nagaoki OMIYA and his son Tokimoto OMIYA on the one side, and Asateru MIBU and his son Harutomi MIBU on the other was intense enough to necessitate the involvement of the Imperial Court and the Muromachi bakufu (Japanese feudal government headed by a shogun).
特に室町時代後期の大宮長興・大宮時元親子と壬生晨照・壬生晴富親子の時期には朝廷や室町幕府を巻き込んだ激しい対立となった。