Onjuku

Onjuku is a surf-centered sandy beachbreak on the Chiba coast, known for offering both left and right waves and for generally clean water. Sources describe it as exposed with harbor-wall and jetties influence, so while wave quality is often reported as good, some reports also flag inconsistency linked to the reef/jetties setup. For surfing, ideal seasonal timing is repeatedly pointed toward autumn, with September emphasized as a standout month. Wave work is described as starting well below 1 m and extending to around 2 m+, with short, punchy rides being most common (typically under about 50 m), while better waves can extend to roughly 50–150 m. Winds from the northwest (and generally offshore/light winds) are reported as the cleanest option for grooming the wave face. Wind sports can also be productive. Kitesurfing is described as best when winds align from the East through south-southwest, and the wide beach makes setup comparatively accessible. Wingfoiling is described as foil-friendly due to the sandy bottom and generally clear water, but riders need to manage the shore break and transition into deeper water beyond the initial break. Safety is a key theme: rocks and the mole/jetties area are repeatedly listed hazards, and rip currents can occur particularly near jetties after heavier swells. Crowd levels are higher on weekends and during summer holiday periods, and summer months may include seasonal swimmer zone restrictions. When conditions are busy, plan approach routes and launch decisions to avoid placing riders too close to mole/harbor-wall areas.