was a professional Go player. Sakai was promoted to 6 dan in 1970.
He had 3 brothers, Sakai Michiharu, Sakai Yasuo and Sakai Yoshimitsu. Some players he taught include Baba Shigeru, Ito Yoji, Hikosaka Naoto, Hiroe Katsuhiko, Okumura Hideo, Hamanaka Takamitsu, Akedo Kazumi, Ikezaki Tokinori, and Hotta Seiji.
Was never a runner-up to any tournament