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.

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.