伊豆熱川温泉　六つの貸切風呂を湯めぐり　ふたりの湯宿　湯花満開

Welcome to YUBANA MANKAI

An Adults-Only Japanese Ryokan by the Sea

Escape the crowds and discover a slower pace of life in Atagawa Onsen, a charming hot spring town on the eastern coast of the Izu Peninsula.

Surrounded by rising clouds of natural hot spring steam and overlooking the Pacific Ocean, Atagawa has been a place of relaxation and healing for centuries. Just a short walk from the ryokan, you’ll find a beautiful beach with stunning views of the Izu Islands.

Established in 1951, YUBANA MANKAI combines the nostalgic atmosphere of a traditional Japanese ryokan with the comfort of modern hospitality.

Immerse yourself in authentic Japanese culture as you soak in natural hot springs flowing directly from the source, savor fresh seafood from nearby waters, and unwind in a peaceful adults-only environment.

Whether you are celebrating a special occasion, enjoying a romantic getaway, or simply seeking a unique Japanese experience, YUBANA MANKAI offers a memorable stay unlike any other.

Your Journey into Traditional Japan Begins Here.

We look forward to welcoming you.

Stay the Japanese Way

Experience the comfort and charm of traditional Japanese hospitality in a room that suits your travel style.

Choose from authentic tatami rooms, modern Japanese-style rooms with comfortable twin beds, ocean-view rooms featuring a private open-air hot spring bath, or spacious suites with a semi-open-air onsen bath.

Wake up to the sound of the ocean, relax on soft tatami flooring, and enjoy a peaceful atmosphere designed to help you slow down and unwind.

Whether you are traveling as a couple, with family, or with friends, every room offers a unique blend of Japanese tradition and modern comfort.

Room Features
・Traditional Japanese tatami flooring
・Ocean-view room options
・Private in-room onsen baths available in selected rooms
・Comfortable bedding and relaxing interiors
・Free Wi-Fi in all guest rooms

Discover a stay that is more than accommodation — experience a part of Japanese culture.

Standard Twin Room

Twin bed rooms with tatami mat floor.
*Each room has it’s own one-of-a-kind personality.
*Dinner and breakfast are served at the dining room “Take no ma”.

Deluxe Double Room with Private Hot Spring Bath

Private Open-Air Hot Spring Bath.
Two Comfortable Double Beds in a Spacious 36 m² Room.
*Each room has it’s own one-of-a-kind personality.
*Dinner and breakfast are served at the dining room “Take no ma”。

Ocean view rooms with an open-air onsen bath

Rooms with an open air onsen bath which has a breath taking ocean view.
*Each room has it’s own one-of-a-kind personality.

Room 501 “SUN SUN”
Tatami mat floor room+living room (2 sofa beds)+twin bed room
Room 502 “REN REN”
Twin bed room with tatami mat floor
Room 503 “CON CON”
Tatami mat floor room+twin bed room

*Dinner and breakfast are served at the dining room “Take no ma”.

COCOON suites

Premium suite rooms with a semi open-air onsen bath.
*Each room has it’s own one-of-a-kind personality.

Room “WAON”
Tatami mat floor room
*Dinner and breakfast are served at the dining room “Take no ma”.

Room “KIZUNA”
Tatami mat floor room+Twin bed room
Room “TOMARU”
Tatami mat floor room
**Dinner and breakfast are served in your room.

Experience Atagawa’s Authentic Hot Springs

Atagawa Onsen is one of Japan’s most celebrated hot spring destinations, renowned for its abundant flow of mineral-rich natural waters.

According to local legend, over 500 years ago, the famous samurai and castle builder Ota Dokan discovered this hot spring after seeing an injured monkey bathing in the warm waters to heal its wounds.

At Yubana Mankai, guests can enjoy six private hot spring baths — three open-air baths and three indoor baths — allowing you to experience Japanese onsen culture in complete privacy with your partner, family, or friends.

All baths are supplied directly from the natural source. Fresh hot spring water continuously flows into each bath without recycling or reheating, a traditional style known as “100% natural free-flowing hot spring” (Gensen Kakenagashi).

Relax in the healing waters, listen to the sounds of nature, and discover a hot spring tradition that has been cherished for centuries.

♨ Tattoo-Friendly Private Onsen

Worried about tattoo restrictions in Japan?

At YUBANA MANKAI, all six hot spring baths are available for private use,
making our ryokan an ideal choice for guests with tattoos.

Enjoy a traditional Japanese onsen experience in complete privacy with
your partner, family, or friends.

Chartered open air onsen bath
“DAIMONJI”

Guardian god: IZANAMI and IZANAGI
Blessings: Love, Marriage
*Free of a charge
*No appointment necessary

Chartered open air onset bath
“AMATERASU”

Guardian goddess: AMATERASU
Blessings: Good luck
*Free of a charge
*No appointment necessary

Chartered open air onsen bath
“SEIGETSU”

Guardian god: TSUKUYOMI
Blessings: Long and healthy life
*Free of a charge
*No appointment necessary

Chartered family onsen bath“NODOKA”

Chartered onsen bath
“SAKURA”

Cherry Blossoms
Language of flowers: Spiritual beauty
*Free of a charge
*No appointment necessary

Chartered onsen bath
“NANOHANA”

Rape Blossoms
Language of flowers: Small happiness
*Free of a charge
*No appointment necessary

Chartered onsen bath
“AJISAI”

Hydrangea
Language of flowers: Reunion of family
*Free of a charge
*No appointment necessary

DINNER AND BREAKFAST

Enjoy the freshest seafood at YUBANA MANKAI.
Izu peninsula is famous for the richness of its seasonal ingredients found in ocean and mountains.
We offer original kaiseki style dishes using fresh local ingredients in season.

Dinner

Savor the fresh seafood from the Sagami Bay.
* This image is an example of dinner menu. The menu varies with the seasons.

Breakfast

We offer traditional Japanese breakfast.
* This image is an example of dinner menu. The menu varies with the seasons.

A LA CARTE

We have special seasonal dishes as a la carte.
* This image is an example of a la carte
*Orders must be made in advance.

Vegan & Vegetarian Options

At YUBANA MANKAI, we are pleased to offer vegan and vegetarian meal options upon advance request.
Our chef carefully prepares dishes to accommodate your dietary preferences whenever possible, allowing you to enjoy an authentic Japanese dining experience.

To ensure the availability of suitable ingredients, please request your vegan or vegetarian meal at least 7 days before your arrival.

Please Note
• This service is different from allergy-friendly meal preparation.
• If you require meals without animal-based seasonings (such as dashi broth), please let us know when making your reservation.
• Menu items may vary depending on seasonal ingredients and market availability.

Explore the Best of Izu

The Izu Peninsula offers breathtaking scenery, unique wildlife experiences,
and some of Japan’s most iconic natural attractions.
All of these popular destinations are easily accessible from YUBANA MANKAI.

Atagawa Tropical & Alligator Garden

Just a 5-minute walk from our ryokan, this unique attraction is home to
rare crocodiles, alligators, and tropical plants. The famous banana greenhouse
and adorable red pandas make it a favorite destination for visitors of all ages.

Approx. 5 min walk

Mount Omuro

One of Izu’s most iconic landmarks. Take a scenic chairlift to the summit
and enjoy spectacular 360-degree views of Mt. Fuji, Sagami Bay, and the Izu Peninsula.
The volcanic crater walking trail is a must-see.

Approx. 30 min by car

Izu Animal Kingdom

An interactive wildlife park where visitors can get surprisingly close to
giraffes, rhinos, white tigers, and many other animals.
A perfect destination for families and animal lovers.

Approx. 15 min by car