World Sudoku Championship
Results summary

Year
Host city
Host nation
Individual
Individual
Individual
Team
Team
Team
Year
Host city
Host nation
Gold
Silver
Bronze
Gold
Silver
Bronze
2020
Shanghai
China
-
-
-
-
-
-
2019
Kirchheim
Germany
-
-
-
-
-
-
2018
Prague
Czech Republic
Japan Kota Morinishi
France Bastien Vial-Jaime
Estonia Tiit Vunk
Japan
China
Germany
2017
Bangalore
India
Japan Kota Morinishi
Estonia Tiit Vunk
China Qiu Yanzhe
China
Japan
France
2016
Senec
Slovakia
Estonia Tiit Vunk
Czech RepublicJakub Ondroušek
Japan Kota Morinishi
Czech Republic
China
Japan
2015
Sofia
Bulgaria
Japan Kota Morinishi
Estonia Tiit Vunk
Czech RepublicJakub Ondroušek
Japan
China
Czech Republic
2014
London
United Kingdom
Japan Kota Morinishi
Estonia Tiit Vunk
France Bastien Vial-Jaime Czech RepublicJakub Ondroušek(tied)
Japan
Germany
China
2013
Beijing
China
China Jin Ce
Japan Kota Morinishi
Czech Republic Jakub Ondroušek
China
Czech Republic
Japan
2012
Kraljevica
Croatia
Poland Jan Mrozowski
Japan Kota Morinishi
Japan Hideaki Jo
Japan
Czech Republic
China
2011
Eger
Hungary
United States Thomas Snyder
Japan Kota Morinishi
Estonia Tiit Vunk
Germany
Czech Republic
United States
2010
Philadelphia
United States
Poland Jan Mrozowski
Czech Republic Jakub Ondroušek
Japan Hideaki Jo
Germany
Czech Republic
Japan
2009
Žilina
Slovakia
Poland Jan Mrozowski
Serbia Branko Ceranic
Czech Republic Robert Babilon
Slovakia
Czech Republic
Serbia
2008
Goa
India
United States Thomas Snyder
Japan Yuhei Kusui
Czech Republic Jakub Ondroušek
Czech Republic
Japan
Germany
2007
Prague
Czech Republic
United States Thomas Snyder
Japan Yuhei Kusui
Slovakia Peter Hudak
Japan
United States
Czech Republic
2006
Lucca
Italy
Czech Republic Jana Tylova
United States Thomas Snyder
United States Wei-Hwa Huang
-
-
-

Question: Who is the most successful team in the World Sudoku Championship? 
Answer: Japan is the most successful team, having won the World Sudoku Championship title in 2007, 2012, 2014, 2015 and 2018; Czech Republic (2008, 2016), Germany (2010 and 2011) and China (2013, 2017) have won twice; Slovakia (2009) also won a title.