Lady Kasuga was a Japanese noble lady and politician from a prominent Japanese samurai family of the Azuchi–Momoyama and Edo periods. Born Saitō Fuku (斉藤福), she was a daughter of Saitō Toshimitsu. She was the wet nurse of the third Tokugawa shōgun Iemitsu. Lady Kasuga was one of the best politicians in the Edo period. She stood in front of negotiations with the Imperial Court and contributed to the stabilization of the Tokugawa Shogunate.
Portrait of Lady Kasuga
Kasuga no Tsubone fighting robbers - Adachi Ginko (c.1880)
A wet nurse is a woman who breastfeeds and cares for another's child. Wet nurses are employed if the mother dies, or if she is unable or chooses not to nurse the child herself. Wet-nursed children may be known as "milk-siblings", and in some societies, the families are linked by a special relationship of milk kinship. Wet-nursing existed in societies around the world until the invention of reliable formula milk in the 20th century. The practice has made a small comeback in the 21st century.
Louis XIV as an infant with his nurse Longuet de la Giraudière
A 16th-century carving in a Belgian church, showing a woman expressing her milk into a bowl.
A Russian wet nurse, c. 1913
A funerary stele (akin to a gravestone) erected by Roman citizen Lucius Nutrius Gallus in the 2nd half of the 1st century AD for himself, his wet nurse, and other members of his family and household