World Rugby Chairman Bill Beaumont has praised Japan as the host nation of the world cup tournament, saying the people have been magnificent and warm hosts.
South Africa beat England in the final in Yokohama on Saturday. It's the second country to win a third World Cup after New Zealand.
Beaumont told a press conference on Sunday that his organization will make it possible for all emerging teams to get regular access in high-level competitions.
The head of the organizing committee, Fujio Mitarai, said no one could have imagined the current rugby boom when Japan was selected as the host country 10 years ago.
He also said the event has helped the Japanese people to understand the spirit of rugby, and many people have become fans of the sport.
The next Rugby World Cup will be held in France in 2023.
The two organizations say a record 99.3 percent of the tickets were sold.
An average of 37,877 people attended each game. Three matches were cancelled because of a typhoon.
A total of 1.137 million people visited 16 fan zones across the country to view the games on giant screens.