In 1183, Mitsuyuki, who was in Heian-kyo (the ancient capital of Japan, present-day Kyoto) at that time, went to Kamakura city to submit a petition of apology and to spare the life of MINAMOTO no Mitsusue, his father who had been on the side of the Taira family.
寿永2年（1183年）に平安京にいた光行は、平家方であった父の源光季の謝罪と助命嘆願のため、鎌倉市に下向した。