Based on a snip of paper pasted to a page of the Fukiage bon of "Teio Keizu" (Genealogical Table of Emperor), the entry of 'Emperor Gokameyama' in "Kokushi Daijiten" (Great Dictionary of National History) says that probably the Emperor's real mother was a daughter of Sanetame ANO, suggesting that the woman might have not been the Kakimon-in.
『国史大辞典』の「後亀山天皇」項では、『帝王系図』吹上本の付紙を根拠に、天皇の生母が阿野実為の娘であることをほぼ確実とする一方で、この人物が嘉喜門院と同一人物ではない可能性のあることを示唆する。