International Yo-Yo Federation

International Yo-Yo Federation (IYYF) is an international Yo-yo organization that promotes World Yo-Yo Contest and European Yo-Yo Championship and develops and promotes yo-yoing as a sport on a global level.

History
The International Yo-Yo Federation (IYYF) was formed on February 8, 2013. World Yo-Yo Contest had been promoted by Greg Cohen since 2000. IYYF was formed to promote world Yo-Yo contest and other international competitions. The United States, the Czech Republic, Japan, and Brazil are the first national members to join the IYYF.

Executive Board

 * Ondrej Sedivy (Czech Yoyo Association)
 * Hironori Mii (Japan Yo-Yo Federation)
 * Rafael Matsunaga (Brazilian YoYo Association)
 * Thad Winzenz (US National Yo-Yo League)
 * Jan Kordovsky (Czech Yoyo Association)

Styles
The 5 Divisions are 1A, 2A, 3A, 4A and 5A:


 * 1) Single-handed String
 * 2) Double-handed Looping
 * 3) Double-handed String
 * 4) Off-string
 * 5) Counterweight

1A is the single unresponsive yoyo category, players are required to use only 1 unresponsive yoyo for their performance.

2A is the double responsive yoyo category, players are required to use 2 responsive yoyos for their performance. This is also known as the hardest yo-yoing style.

3A is the double unresponsive yoyo category, players are required to use 2 unresponsive yoyos for their performance.

4A is the Off-string yoyo category, players are required to use a specially designed offstring yoyo for their performance, there are no limits to how many offstring yoyos you can use in the 4A category.

5A is the Off-hand yoyo category, players are required to attach a special counter weight to a single unresponsive yoyo on the string for their performance.

Events

 * World Yo-Yo Contest
 * European Yo-Yo Championship
 * Asia Pacific Yo-Yo Championships
 * Latin American Yo-Yo Contest
 * U.S. National Yo-Yo Contest

Winners

 * List of yo-yo world champions

Nations
Source: