Onjuku

Onjuku is a sand beach break with left and right peaks across a gently sloping bottom, making it suitable for surfers of all levels but particularly beginner-friendly. South and south-southeast swells drive the break, with northwest winds providing the cleanest conditions. The spot receives mixed wind and groundswell with typical swell ranging from two to three feet, though it can reach head-high in autumn. Rocks present a hazard, and crowding occurs during peak periods. Water here is notably warm year-round due to southern ocean currents.

Onjuku has established itself within Japan's competitive and lifesaving communities rather than as a classic surf destination with a long heritage. It hosts Japan's annual national lifesaving carnival and notably hosted the 2013 International Surf Rescue Challenge, reflecting its role as a training ground and venue for organized water sports rather than a spot with deep historical roots in surfing culture.

Onjuku sits on Chiba's eastern Pacific coast, approximately one hour from Tokyo by train. The town occupies the Boso Peninsula with a characteristically wide, flat sand beach. Facilities include showers, restrooms, lifeguard service, camping areas, a surf school, and a shop, making it easily accessible for visiting surfers.