Located in Inatori Onsen Hamanoyu, which juts out into the sea like a peninsula, Hama-no-Yu offers an unobstructed panoramic view of the ocean. You can enjoy this spectacular view along with a soothing hot spring at Sky Fontaine on the top floor, 8th floor. It is a large, relaxing space with 16 bathtubs spread across the entire floor. The large baths are the 23m long Boyo Dai Rotenburo and Manten Daiyoku. Each bath is equipped with a Tembo bath (indoor bath), a large open-air bath, a standing bath, a reclining bath, a stone bath, and a sauna, and can be enjoyed by men and women on a shift basis. Manten Daiyoku also has a cave bath and a cypress bath.
The "Boyou Dai Open-Air Bath" is what fascinates everyone who visits. Not only can you enjoy a 270-degree ocean view, but it is an infinity open-air bath that appears to be connected to the sea, giving you the illusion of floating on the ocean. You can enjoy an extraordinary moment gazing at the ocean shining in the light during the day, and at night, soaking in the illuminated bathtub, gazing at the twinkling stars in the sky and shooting stars with their trails.
The moonrise is a moving sight. Especially on full moon nights, as the moon rises, the light creates a long ribbon on the surface of the sea called the Moon Road. Its fantastical beauty is enough to leave you speechless. In the early morning, you can also see the sunrise rising from the horizon, a sight unique to the east coast of Izu. The charm of Hamanoyu is that you can encounter many moving moments.

Located in a seaside hot spring resort, the sea is right in front of you. You can enjoy this wonderful location with a resort-like atmosphere in the rooms, which come in a wide variety of types: six types of "Luxury Suite with Open-Air Bath", seven types of "DX Suite with Open-Air Bath" (new rooms will be added in 2023), four types of "Deluxe with Open-Air Bath", one type of "Luxury Standard", five types of "Suite with Open-Air Bath", one type of "Semi-Suite with Open-Air Bath", five types of "Luxury Standard" (new rooms will be added in November 2024), and six types of "Premium Standard". Hamanoyu embodies the "culture of a ryokan". Another major feature is that you can enjoy in-room dining in any of the rooms.

Sky Fontaine also features a private terrace called the Sky Terrace & Spa El Dange, which can be rented for a fee, as well as the 110-square-meter private bath called the Suite Private Spa, which will add a long-awaited loyly sauna and cold bath in July 2024, providing an elegant bathing experience with an exceptional sense of privacy.

Hamanoyu has maintained a management policy of focusing on cuisine, as it has bidding rights at Inatori Fishing Port. The famous "Funamori Morning Plate" has been a big hit since it was first offered, and word of mouth has led to an increase in repeat customers. "If you want to enjoy fish dishes, Hamanoyu to go. I'll come back to eat." The boat-shaped plate has now become synonymous with Hamanoyu.

Hamanoyu always serves three standard dishes: red snapper, spiny lobster, and abalone. The dishes are all carefully prepared with the utmost care, and are a well-balanced selection of exquisite dishes, including dishes prepared with the skill of a craftsman and dishes with the volume typical of Izu. A symphony of delicious dishes is brought to the table.

Hamanoyu signature abalone dish is the "Abalone Steak with Homemade Sauce." It is a masterpiece that combines the deep, luxurious seafood ingredient of abalone with the chefs' creative spirit and artisanal technique. The liver of the abalone, which is full of the flavor of the seashore and the minerals of seaweed, is strained and slowly cooked to make a sauce without using any chemical seasonings. The flesh is sautéed in butter, and what really stands out is the degree of doneness that only a craftsman can achieve. The essence of Hamanoyu cuisine is the determination to cook abalone without compromising its texture and flavor. Don't think that abalone is tough; Hamanoyu abalone has a soft texture and flavor.