It is said that, when Guen Shonin died at the age of 80 in the beginning of the Genroku era, he said that he was the second son of Hideyori TOYOTOMI and he was three years old at the time of the fall of Osaka-jo Castle ("Jodo Honcho Kosoden").
また、求猒上人が元禄初頭に80歳で没する時、豊臣秀頼の次男で落城時に3歳であったと語ったとされる（『浄土本朝高僧伝』）。