Sansa
Honinbo Sansa (本因坊算砂 Hon'inbō Sansa, 1559-1623) was a famous Go player.
Sansa was the first head of the Honinbo house and the first Meijin, taking the name Sansa. Sansa was the rival of Kashio Rigen. He was also a strong shogi player. He was a Buddhist priest of the Nichiren sect and his original name was Nikkai. He lived in a temple pavilion called Honinbo where he taught Go from.
In a Hikaru no Go chapter, Kimihiro Tsutsui acts as Nikkai in a play.
Above picture from Nihon Kiin website.