The fox mother Kuzunoha – Foxes, as we all know, especially Japanese foxes have supernatural powers. One in particular took pity on a human male who had faced horrendous losses. So, Kuzunoh, our fox in question, turned herself into a beautiful woman, married the man, bore him a son and then when the jig was up reverted to form and left the domestic scene. Below is that moment when the child and husband see Kuzunoha exit
Japanese Ghosts and Demons CD-ROM and Book
One Hundred Stories of Demons and Spirits, by Kitagawa Utamaro
'Rokujou-miyasudokoro', very noble woman, but became a living vangeful ghost in 'Genji-monogatari'.
Immortal Seiobo on Kirin (main detail of a hanging scroll), ca. 1830’s - Nakajima Kayo
New Year's Eve Foxfires at the Changing Tree, Oji, No. 118 from One Hundred Famous Views of Edo, 1857. It was believed that on New Year's Eve all the foxes of the surrounding provinces would gather at a particular tree near Oji Inari Shrine, the headquarters of the regional cult of the god Inari. There the foxes would change their dress for a visit to the shrine, where they would be given orders for the coming year.... more about this at the link in comments.
The spirit of the heron maiden woodblock print by Taniguchi Kokyo (1864-1915), dated 1925
The Prostitute Ohyaku and a Seated Ghost by Tsukioka Yoshitoshi, 1866.