Yu-Gi-Oh! World Championship 2011

Champion
Ogawa Takashi “アーサー” (Japan) [Agent Fairy]

1st Runner-up
Murakoshi Kei “王子” (Japan) [Junk Doppel]

2nd Runner-up
Galileo De Obaldia (Panama) [Junk Doppel]

3rd Runner-up
Phanupak Kongjaroen “Foil” (Thailand) [Machina Gadget]

Top 8
Michel Grüner (Germany) [Junk Doppel]
She Wei Hao (Taiwan) [Six Samurai]
Yang Young-Duck (South Korea) [Six Samurai]
Kaven Sue Zhen Xian (Singapore) [Junk Doppel]

Preliminary Non-Qualified Players
Kim Just Jensen (Denmark) [Disaster Dragon]
Thomas Mak (USA) [Agent Fairy]
Kee Kian Sim “Sam” (Malaysia) [Six Samurai]
Raul Fernandez (Spain) [Worm]
William Pedigo (USA) [Agent Fairy]
Joseph Bogli (USA) [Junk Doppel]
Osawa Yusuke “バブル” (Japan) [Junk Doppel]
William Israel Sy “Wslasher” (Philippines) [Six Samurai]
Tang Bo “Tample” (Canada) [Agent Fairy]
Justin Womack (USA) [Empty Jar]
Jose Ubilla (Ecuador) [Machina Gadget]
Hansel Aguero (USA) [T.G. Beast]
Kevin Matsuoka (New Zealand) [T.G. Plant]
Luke Lennard (UK) [Six Samurai]
Jose Cubero (Costa Rica) [Junk Doppel]
Aaron Dennis (New Zealand) [Frog Monarch]
Waga Tadashi “syelu” (Japan) [Junk Doppel]
Lui Hoi Ki “海狗” (Hong Kong) [Six Samurai]

The World Championship uses a special Forbidden & Limited Cards list to ensure that all competitors are on a level playing field.

Credits to DuelingDays for Top 8 decks information.

Yu-Gi-Oh! World Championship 2010

Champion
Galileo De Obaldia (Panama) [Frog OTK]

1st Runner-Up
Vincent Paglia (USA) [Blackwing]

2nd Runner-Up
Kuwano “みのりん” Kei (Japan) [Herald of Perfection]

3rd Runner-Up
Kim Tae Woo (South Korea) [Blackwing]

Top 8
Kawai “Ａ１” Hideki (Japan) [Frog Monarch]
Aaron Noel (Canada) [Blackwing]
She Wei Hao (Taiwan) [Frog Monarch]
Stefano Sluis (Netherlands) [Infernity]

Preliminary Non-Qualified Players
Watanabe “ゆーま” Yuma (Japan) [Blackwing]
Stefano Memoli (Italy) [Infernity]
Chris Arantes (USA) [Blackwing]
Rodrigo Togores (Spain) [Frog OTK]
Tan Sung Lee (Malaysia) [Gigavise]
Thanin Siripojanakul (Thailand) [Blackwing]
Sean Montague (USA) [Gladiator Beast]
Benjamin Tan Hong Hwee (Singapore) [Blackwing]
Luk Chi Hang (Hong Kong) [Quickdraw Dandywarrior]
Juan Pablo Vera (Argentina) [Frog OTK]
Daniel LaMartina (USA) [Gladiator Beast]
Jeremy Chua (Singapore) [Machina Gadget]
Tanaka “レオパルド” Shogo (Japan) [Frog Monarch]
Sebastian Gonzalez (Belgium) [Blackwing]
Alvin Lim (Philippines) [Machina Gadget]
Ewan O’Keefe (Australia) [Gladiator Beast]
Kevin Lau (New Zealand) [Gladiator Beast]

Yu-Gi-Oh! World Championship 2009

Champion
Benjamin Tan Hong Hwee (Singapore) [Blackwing]

Finalist
Chien Yen-Jui (Taiwan) [Gladiator Beasts]

Top 4
Roy St. Clair (USA) [Blackwings]
Lee Hong Kyu (Korea) [Gladiator Beasts]

Top 8
Alexander Antonios (Australia) [Gladiator Beasts]
Au Man Lai (Hong Kong) [Gladiator Beasts]
Chris Gehrig (New Zealand) [Gladiator Beasts]
Sam Kee Kian Sim (Malaysia) [Blackwings]

Preliminary Non-Qualified Players
Kazuma Ishikawa (Japan) [Gladiator Beasts]
Michael Kohanim (USA) [Gladiator Beasts]
Vittorio Wiktor (Germany) [Synchro Cats]
Sharief Al-Aziz Mahomedradja (Netherlands) [Synchro Cat]
Ryan Newburn (USA) [Blackwings]
Kazuki Mutsuoka (Japan) [Synchro Cat]
Sebastien Legay (Belgium) [Synchro Cat]
Kris Ferber (USA) [Synchro Cat]
Satoshi Kato (Japan) [Gladiator Beasts]
Esteban Almeida (Ecuador) [Synchro Cat]
Charles Easton (Canada) [Synchro Cat]
Yuya Abe (Japan) [Synchro Cat]
Ryosuke Kasuga (Japan) [Synchro Cat]
Eduard Alvarez Carrera (Spain) [Synchro Cat]
Jose Hernandez (Mexico) [Lightsworn]