In the 1st edition (2007-2008), 50 players each played 6 games. The winner was Ko Iso with 6-0.
In the 2nd edition (2008-2009), 50 players each played 12 games. The winner was Iyama Yuta with 12-0.
In the 3rd edition (2009-2010), 40 players each played 8 games. The winner was Cho Chikun, with 8-0.
In the 4th edition (2010-2011), 34 players each played 8 games. The winner was So Yokoku with 8-0.