Tokyo is gearing up for the 2020 Olympic Games, and the eyes of the surfing world are focused on the waves the country has to offer.

However, what many of us didn't know was that there are also interesting conditions in Japanese river mouths.

For example, take the Kaifu River, in the Tokushima Prefecture. The spot pumps endless right-handers, and it could very well be a backup site for Tsurigasaki Beach, Olympic surfing venue for Tokyo 2020.