The JKA World Cup – also known as the "Shoto Cup", the "Shoto World Cup", and the "Funakoshi Gichin World Cup" – is the equivalent of Olympic competition for members of the JKA. Every three years, the global Shotokan community comes together to compete at this event, to which each country sends a select national team. Selections take place at a national tournament which draws athletes from dojos all over the country, all vying for a spot on either the kumite or kata squads.
To get a feel for the outstanding level of competition, watch this video from the 2014 World Cup held in Tokyo, Japan:
For more video examples, watch this Shotocup playlist on YouTube.