On July 13, 1212, there was a sword fight in the building of Samurai-dokoro (the Board of Retainers), triggered by a quarrel among gokenin who were on tonoi (guard), and some were killed.
建暦2年（1212年）6月7日、侍所の建物内で宿直の御家人同士のいざこざから刃傷事件があり死者も出た。