"Mikawawan Hills Hotel" is a spectacular spa hotel in Higashihazu-cho, Nishio City, Aichi Prefecture. Standing near the summit of Mount Mikane, it offers a dramatic panorama of the calm Mikawa Bay, the surrounding islands, and, at night, the sparkling cityscape of Gamagori stretching out below. Both of the gender-swapping observation baths, Tenkei and Shikisai, are equipped with saunas, including a strong convection dry sauna that reaches an astonishingly high temperature, and an infrared sauna that lets you work up a deep sweat. After the sauna, you can refresh yourself in a pleasant cold plunge bath, available only at Tenkei, or enjoy a luxurious outdoor bath while gazing at the vast ocean panorama spread out below, leading you into a blissful state of totonou. In the open-air bath, you can enjoy the natural hot spring water of the famous Ikedayuge Onsen and indulge in its silky, skin-smoothing waters.