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).
Kato Tomoko and Inoue Naomi are her pupils, while she was a pupil of Kita Fumiko. She is married to Sugiuchi Masao 9-dan.
She won the Women's Meijin from 1991-1994, the Women's Kakusei in 1983, and the All Japan Women's championship from 1953-1955.
Sugiuchi Kazuko, Honda Sachiko and Kusunoki Teruko are the three Honda sisters.