In the mid-fifteenth century (the Muromachi period), the offspring of Sadatsugu OIKAWA raised a rebellion against the KASAI clan, but Mitsumura suppressed it.
十五世紀中頃（室町時代）、及川定嗣の子孫は葛西家に対して謀叛を起こしたが、光村がこれを鎮圧。