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Konami Card Game Official Tournament Support System (COSSY) Information

The Yu-Gi-Oh! TRADING CARD GAME’s ranking system is administered through COSSY (Card Game Official Tournament Support System), with each season beginning every April. 

How do you measure up in the Yu-Gi-Oh! TRADING CARD GAME tournament scene? Find out by checking your COSSY rankings!


If this is your first time visiting this site, or if you are participating for the first time registering your Player ID Card, you will need to register here.

COSSY ID Cards are available at our Official Tournament Stores ("OTS").

The only way to earn COSSY points is by participating in Sanctioned tournaments – either at one of our Official Tournament Stores (OTS) or a premier event, such as a YU-Gi-Oh! Championship Series or Yu-Gi-Oh! Extravaganza.  Keep checking back to see where the next event will be held!



Each quarter will be filled with thrilling Sanctioned premier level tournaments, local events and Regional Qualifiers – enough to satiate every level of the Yu-Gi-Oh! TCG Duelist.

Prizes will be given to those Duelists who participate in Sanctioned tournaments during the qualifying quarter, and finish among the top ranked Duelists in their COSSY region.  For the Americas, we will be awarding prizes to the Top 500 Duelists from the United States, Top 50 from Canada and the Top 100 from Latin America.  To be eligible for prizes, be sure to register your personal information at https://www.cossy.konami.net/, so that we can mail your prize to you.


To make sure everyone gets a chance to earn their way up the rankings, KDE needs your help.  Duelists need to get their local stores on board with COSSY, as in some cases, this is the only way for Duelists to earn COSSY points. Duelists will get a real sense of where they rate and stores that utilize COSSY will enjoy stronger Yu-Gi-Oh! participation from their player base.  Sanctioned tournaments using KTS, such as the Regional Qualifiers, count toward your rankings too, as long as the results are submitted to KDE!

Find an Official Tournament Store (OTS) near you and start Dueling!