, formerly , was a Japanese female 7-dan professional Go player at Nihon Ki-in.
Reiko Kobayashi has several professional players in her family.
Reiko Kitani was trained by her father Minoru Kitani, and eventually married one of his best students, Koichi Kobayashi, who was 13 years younger. They had one daughter Izumi Kobayashi. Reiko Kobayashi died after an 18-month battle with cancer.