Boat Cruises, Mini Unadon, and Summer Activities Arrive at Grand Mercure Lake Hamana Resort & Spa
Grand Mercure Lake Hamana Resort & Spa in Hamamatsu, Shizuoka Prefecture, rolls out summer 2026 programs including a boat cruise departing from its own pier, a customizable mini unadon at the dinner buffet, a Tamiya Mini 4WD experience, and family activities such as ground golf, hand-held fireworks, and a pool season extended through September 27.