In 'a diary of Sukemasa IRIE' written by Sukemasa IRIE who served as the Grand Chamberlain of the Emperor Showa, there is a description that the Empress Kojun complained to the Emperor Showa with both Princess Chichibu Setsuko and Princess Kikuko, the wife of Imperial Prince Nobuhito, saying 'It is unforgivable to have a common woman as a wife for the Crown Prince.'
昭和天皇の侍従長を務めた入江相政の著作「入江相政日記」には、「東宮様のご縁談について平民からとは怪しからん」と香淳皇后が秩父宮妃勢津子、宣仁親王妃喜久子の両親王妃とともに昭和天皇に訴えたという内容の記述がある。