18th Agon Cup
The 18th Agon Cup began on 21 April 2011-1 October 2011. Two Korean amateur players were invited to the preliminaries, with both qualifying. Ha Sungbong defeated professionals Yanigasawa Satoshi and Furuya Yutaka. Kim Sungjin defeated 25th Honinbo and Japan's top title holder Cho Chikun. He also defeated Kato Atsushi; in the main tournament, he was knocked out by Iyama Yuta Meijin in the first round. Iyama Yuta came out as the winner, he beat Yamashita Keigo at the final. The winner's prize was ¥10,000,000.
|Round of 16||Quarter-finals||Semi-finals||Final|
|Ha Sungbong (A)||B+R|
|Kim Sungjin (A)|
- "18th Agon Cup(All-Japan HayaGo Open Tournament)". igokisen.web.fc2.com. Retrieved 8 June 2011.
- -, Jing. "Iyama Yuta wins Agon Cup, Kong Jie becomes Mingren challenger". Go Game Guru. Go Game Guru. Retrieved 3 May 2017.
- -, The Nihon Ki-in. "第18期 阿含・桐山杯 全日本早碁オープン戦". The Nihon Ki-in. The Nihon Ki-in. Retrieved 3 May 2017.