Ko Iso

Ko Iso, (born April 10th, 1987) is a Nihon Ki-in pro. He become pro in 2002, reaching 2-dan in the same year, and 4 dan in 2005. He was promoted from 4 dan to 7-dan on 27 October 2005 when he beat Kono Rin to claim a berth in the Meijin league. At that time, he was the youngest player to have played in a league. 8 dan in 2011.

He was runner-up in the 2006 Shinjin O. In 2008 he won the first YugenCup. After some period of weak results, he'll be in the 67th Honinbo league.

He is also known as Huang Yih Tzuu, and his name is displayed as such on the Nihon Ki-in page.

• Nihon Ki-in player profile