Kaifu River, located in Tokushima, is known for its unique rivermouth waves. This spot comes to life when the conditions are just right, particularly needing a moderate Southeast swell to fire up. On those rare days when it really works, expect a good number of surfers around, especially on weekends. Although access is easy with steps leading down, the current can be quite strong, so it's a good idea to be prepared.

The waves here mainly break to the right over boulders, with optimal conditions arising under a Southeast swell and Northwest winds. It can handle swell sizes of up to 4 feet (about 1.2 meters), and you'll see those hollow rights rolling in when everything aligns perfectly. There’s also a shorter left off the peak, but the primary focus is definitely on the right. To maximize your chances of scoring, the best tides to surf are low to mid, but remember, this spot is best suited for experienced surfers due to the heavy rips.

Besides the wave action, Kaifu River is positioned in the beautiful Ana Quasi National Coastal Park, making it a scenic spot to surf. Just keep in mind that when the waves are on, it can get pretty crowded, so be ready to share the lineup. Respect the environment and your fellow surfers, and enjoy your time at this unique location.