The 1st Igo Masters Cup began on 24 February 2011 and is still ongoing. Eleven players participated: Kobayashi Koichi (Honorary Kisei, Meijin, and Gosei), Kudo Norio (Tengen 1997, Oza 1977), Rin Kaiho (Honorary Tengen), Kataoka Satoshi (Tengen 1982, 1983), Hane Yasumasa (Oza 1990), Ishida Yoshio (24th Honinbo), Takemiya Masaki (Meijin, Honinbo, and Judan), Cho Chikun (25th Honinbo, Honorary Meijin), O Rissei (Kisei, Judan, and Oza), Kobayashi Satoru (Kisei, Gosei 1995), Otake Hideo (Honorary Gosei).
Kobayashi Koichi, Ishida Yoshio, Takemiya Masaki, Cho Chikun, and Otake Hideo were given first round byes.
| Quarter-finals | Semi-finals | Final | ||||||||
| 24 March | ||||||||||
| Kobayashi Koichi | 1 | |||||||||
| 25 June | ||||||||||
| Rin Kaiho | 0 | |||||||||
| Kobayashi Koichi | 1 | |||||||||
| 24 March | ||||||||||
| Ishida Yoshio | 0 | |||||||||
| Kataoka Satoshi | 0 | |||||||||
| Ishida Yoshio | 1 | |||||||||
| Kobayashi Koichi | ||||||||||
| 31 March | ||||||||||
| Cho Chikun | ||||||||||
| Takemiya Masaki | 0 | |||||||||
| 25 June | ||||||||||
| Cho Chikun | 1 | |||||||||
| Cho Chikun | 1 | |||||||||
| 21 April | ||||||||||
| Kobayashi Satoru | 0 | |||||||||
| Kobayashi Satoru | 1 | |||||||||
| Otake Hideo | 0 | |||||||||