Go is the Japanese reading of his Chinese name. He was born Chinese, and his surname is 五, the number “5”, pronounced Wu in Chinese and Go in Japanese. Not the same “Go” as in igo (… but the same “go” in “gomaku”, the game of five-in-a-row)

His opponents who played him were sometimes mystified, though the reason often becomes clear many moves down the road. He was not afraid of starting complex fights, even ko fights, and the games often have huge swings in territory. He played in a way with great freedom. Opponents would play thinking they played a forcing move, only for Go Seigan to tenuki (play elsewhere on a board, often at strategically vital points). People have tried to replicate his style, but it is difficult to put into practice without Go Seigan’s reading skills.