The Daiwa Cup full name Daiwa Securities Cup Net Igo Open is a Go competition.
The Daiwa Cup is sponsored by Daiwa Securities Group. The format of the tournament is a round robin with 4 leagues and 4 players in each league. Games are played on Saturday and Sunday nights on the Nihon Ki-in go server. The time allowance is five minutes per player, followed by a byo-yomi of 30 seconds a move. The winners purse is 1,500,000 Yen ($12,700).
| Winner | Runner up | Year Held |
|---|---|---|
| Takao Shinji | Cho U | 2006 |
| O Meien | Yoda Norimoto | 2007 (2nd) |
| Takao Shinji | Iyama Yuta | 2007 (3rd) |
| Kono Rin | Kobayashi Koichi | 2008 |
| Kono Rin | Iyama Yuta | 2009 |