Shunmoji was the youngest child of Matsu (Hoshunin) born at the age of thirty-four and the most beloved among the siblings, and quite a few notes by Hoshunin in her own handwriting addressed to Shunmoji (Ochiyo: wife of Tadataka, etc., Kamoji: wife of Murai, Shunmoji) exist in the Kaetsuno Bunko (Kaetsuno collection) and Maeda Tosanokamike Shiryokan (Museum of the Maeda family, governor of Tosa Province) in Kanazawa City.
春香院はまつ（芳春院）34歳の末子でもあり、子供のうちで最もかわいがられたようで、春香院（おちよ：忠隆妻など、かもじ：村井妻、しゅんもじ：春香院）宛の芳春院自筆状が金沢市の加越能文庫や前田土佐守家資料館などに多く現存する。