An entry on September 25, 1432 of the "Kanmon Nikki" (Diary of Imperial Prince Fushiminomiya Sadafusa) says that so Gosukoin (other name of Imperial Prince Fushiminomiya Sadafusa) wrote a cover letter to the Ouchi clan, and further gave the henki (to give one kanji character of a noble man's name whose name has 2 kanjis to a person-derived from an old Chinese superstition) to the son of the visiting prince and named him 'Narihiro.'
そこで後崇光院は大内氏に宛てて添状を書き、更に、宮の子息に偏諱を与えて「成煕」を名乗らせたという（『看聞日記』永享4年8月22日）。