Heiwajima Onsen

Heiwajima Onsen is one of Tokyo's largest natural hot spring facilities, drawing 150 tons of mineral-rich waters from 2,000 meters underground in Ota-ku near Haneda Airport. The expansive complex offers an impressive variety of bathing experiences, including high-carbonate soaking tubs, jet baths, whirlpool baths, reclining baths, and the Togoal therapeutic bath beneficial for joint pain, lower back discomfort, and stiff shoulders. Both men's and women's facilities feature a hot stone sauna and a traditional Finnish-style Loyly sauna where water infused with natural aromas is ladled over heated stones, releasing negative-ion-rich steam that supports detoxification and metabolism. Wellness services include shiatsu massage, Indian-style head massage, Bali-style aromatherapy, chiropractic sessions, and foot reflexology. Set within the BIG FUN Heiwajima entertainment complex, the onsen is accessible via a free shuttle from Heiwajima Station.