Windsurfing and SUP on Lake Hamana

Windsurfing and SUP on Lake Hamana takes place on Hamanako, a large brackish lagoon on the edge of Hamamatsu City in Shizuoka Prefecture, in the sheltered inner bays near the Kanzanji Onsen resort area. The lagoon covers about 65 square kilometres and has calm, shallow bays suited to first-time paddlers and windsurfers alongside more open stretches favoured by experienced sailors chasing the lake's steady thermal winds. No previous experience is required for stand-up paddleboarding or beginner windsurf lessons; outfitters around Kanzanji Onsen rent boards and rigs by the hour and run introductory lessons that cover balance, basic paddle or sail technique, and water safety before participants head out into a sheltered bay. Buoyancy aids are provided with every rental, and instructors keep beginners within sight in the calmer inner sections of the lake; participants should be comfortable in open water and able to swim, though the lagoon's shallow, sheltered bays make it accessible to most fitness levels. Board and rig or paddle equipment is available to rent, along with a wetsuit for cooler months; participants should bring swimwear, reef shoes for the sometimes muddy or rocky shoreline, and sunscreen. The season runs roughly April to October, when water temperatures are comfortable, and Lake Hamana is known among windsurfers specifically for its dependable afternoon thermal winds through spring, summer and autumn. Outfitters generally do not run sessions in the depths of winter, when water temperatures drop and thermal winds are less consistent.