The main building's top-floor observatory large public bath, where you can be enveloped in a spectacular view that feels as if you have become one with the sea while listening to the gentle waves of Toyama Bay. In addition to the spacious indoor large public bath, it also features an open-air bath where the sea breeze drifts softly through. On clear early mornings, you can experience the one-of-a-kind thrill of soaking in the tub while gazing at the beautiful sunrise rising over the 3,000-meter-class Tateyama Mountain Range across Toyama Bay.

Umiakari's motoyu, quietly standing on a hill about 3 minutes on foot from the main building's front desk and also open for day-use. In a dynamic natural rock bath with a soothing warmth from nature, 100% natural premium spring water that gushes from the grounds is luxuriously poured in free flow. Drawing from a private spring different from the one used in the main building, this authentic free-flowing hot spring is highly praised even by seasoned onsen lovers for leaving the skin smooth after bathing.

A luxurious private open-air bath equipped in the premium guest rooms of the main building, Mori no To Open-Air Bath Guest Rooms. You can freely enjoy the mellow warmth of high-quality Himi Onsen filling the tub at any time, 24 hours a day, while privately taking in the panoramic natural beauty of Toyama Bay spread out before you. An ultimate luxury space for staying guests only.