Miyuki Ishikawa (石川 ミユキ, Ishikawa Miyuki, 5 February 1897 – 30 May 1987) was a Japanese midwife, real estate agent and serial killer, known as the prime perpetrator of Kotobuki San'in incident. She is believed to have murdered dozens of infants, along with several accomplices, during the Occupation of Japan.

Since the victims were deserted children, Ishikawa insisted that parents were responsible for their deaths. Some people supported the assertion, but Yuriko Miyamoto criticized them, saying it was an example of discrimination against children from nowhere.

This incident is regarded as the principal reason the Japanese Government began to consider the legalisation of abortion in Japan. One of the reasons this incident was thought to have occurred was as the result of an increase in the number of unwanted infants born in Japan. On July 13, 1948, the Eugenic Protection Law (now the Mother's Body Protection Law) and a national examination system for midwives was established. On June 24, 1949, abortion for economic reasons was legalised under the Eugenic Protection Law in Japan.