Nagisa-no-Yu stands on the northern tip of Tsushima, Japan's northwesternmost inhabited island, in the village of Nishidomari, Kamitsushima. From this seaside hot spring facility, bathers gaze out across the Korea Strait, and on clear days the skyline of Busan, South Korea, is visible to the naked eye. Since antiquity Tsushima has served as a bridge between Japan and the Asian continent, earning it the title of Border Island. The mildly alkaline simple thermal water is gentle on the skin. The facility offers an indoor bath, open-air bath, sauna, cascading bath, and jet bath, with the outdoor tub providing sweeping ocean views. Located roughly two hours by car from the island's main town of Izuhara, the northern reaches of Tsushima attract few tourists, preserving a tranquil, uncommercial atmosphere. The waters are reputed to ease neuralgia, fatigue, muscle pain, and cold sensitivity. Bathing at the very edge of Japan, swept by sea breezes from the strait, is an experience found nowhere else.