Natural hot springs or onsen are popular across the country and form a strong part of Japanese culture. There are more than 3000 onsen which range from indoor, outdoor, gender separated, mixed, developed and undeveloped. Many hot spring baths belong to a ryokan (traditional Japanese Inn) while others are public bath houses. An overnight stay at a hot spring ryokan is a highly recommended experience. Try soothing away your stresses away at Hakone Hot Springs near Mt Fuji, about one hour by high speed train from Tokyo.
Kotokuin Temple @ Kamakura, Guilhem Vellut