The first confirmed reference to them is the entry dated July 17, 1205 in which they appear among the army in charge of defeating Shigetada HATAKEYAMA who had risen against the shogunate during the time of MINAMOTO no Sanetomo the third shogun.
三代将軍・源実朝の代の元久2年（1205年）6月22日(旧暦)条畠山重忠の乱における重忠討伐軍の中に初めて確認される。