Sugiuchi Kazuko (杉内 寿子), née Honda Kazuko (本田 寿子, born 1927) is a Nihon Ki-in female professional Go player.
She learned Go from her father, starting at age 6.
Sugiuchi reached 8-dan in 1983. Until 2012-12-06 she held the record for most wins (female players) in Japan (589 wins in her career).
After the death of her husband, she returned at the age of 91 to active play, competing for all 7 Japanese titles and 4 female tournaments.