Izumi Kobayashi, Kitani's granddaughter and a top female Go player, married Cho U, the student of Go's Student Rin Kaiho. Kitani dojo Kitani was subsequently noted as the most prolific teacher ever of future professional players. The Kitani dojo, which began to flourish after 1945 in the Kitani house in the countryside, was in practical terms run by his wife, produced a whole generation of top players who would dominate Japanese go from the early 1970s to mid-1990s. His own daughter Reiko (1939–1996) reached 6 dan and won the All-Japan Women's Championship several times, and married one of his best students, Koichi Kobayashi. Their child, Izumi Kobayashi, Kitani's granddaughter, is now one of Japan's current leading female players.
Izumi Kobayashi, Kitani's granddaughter and a top female Go player, married Cho U, the student of Go's Student Rin Kaiho. Kitani dojo Kitani was subsequently noted as the most prolific teacher ever of future professional players. The Kitani dojo, which began to flourish after 1945 in the Kitani house in the countryside, was in practical terms run by his wife, produced a whole generation of top players who would dominate Japanese go from the early 1970s to mid-1990s. His own daughter Reiko (1939–1996) reached 6 dan and won the All-Japan Women's Championship several times, and married one of his best students, Koichi Kobayashi. Their child, Izumi Kobayashi, Kitani's granddaughter, is now one of Japan's current leading female players.

