Sugiuchi became a professional in 1941. By 1959, he had reached 9 dan. His nickname is "the God of Go" (Japanese Go no Kami-sama) because of his very serious style and straight-laced personality. In December 2004, he became the oldest Nihon Ki-in professional to reach 800 career wins. He is married to Sugiuchi Kazuko (née Honda), one of three professional go-playing sisters.