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KAI Hoshino Resorts KAI Atami

KAI Hoshino Resorts KAI Atami

Located 50 minutes by train from Tokyo, KAI Atami is a hot spring ryokan that overlooks Sagami Bay. It is housed in a historical mountain inn built in 1849, updated with contemporary comforts. Guests may also stay at the Villa del Sol, an elegant seaside auberge at the foot of the mountain that serves French cuisine.

  • 50 min. From Tokyo
  • English-speaking staff
  • Best Rate Guarantee
  • Free Wi-fi
  • Outdoor bath
  • Half-board

What is KAI?

What is KAI?

Japan’s hidden luxuries—at your fingertips

KAI is a leading brand of luxury boutique hot spring ryokans. Every establishment offers a contemporary take on the traditional Japanese inn, providing unique, location-specific experiences—from exclusive activities to specialty suites—designed to immerse guests in the lavish world of Japanese regional craftsmanship.


Guests may choose from one of our 16 Japanese-style rooms in KAI Atami—an elegant work of classic Japanese architecture that overlooks Sagami Bay—or one of our 7 ocean-view Western-style rooms in the Villa del Sol, a stylish contemporary auberge located by the sea.

KAI Signature Rooms

KAI Signature Rooms incorporate elements of regional craft cultures in their design. The one Signature Room at KAI Atami has a design based on an Atami delicacy: ume plum. The color and scent of ume imbue the room, while complimentary snacks made from ume are also served.

Room types (7)

KAI Amenities

100% flax yukata

These casual kimono have been meticulously woven to provide cooling in the summer and heat in the winter.

Wrapping cloth

In Japan, objects are traditionally carried around in a makeshift bag formed from a sheet of cloth. Guests are invited to use these cloths to carry their belongings around the premises.

Luxury mattresses

Our own brand mattresses have been designed to provide proper support to the body while also being soft enough to sink into, allowing for undisturbed sleep.

Other amenities

Bath / TV / phone / electric kettle / fridge / safe box / hair dryer / toilet with bidet functions / air purifier with humidifying function


Meals at KAI Atami are served in the guest's room, and feature traditional Japanese dishes prepared with locally sourced seasonal ingredients such as Ise lobster and splendid alfonsino. At the Villa del Sol, meals are French and prepared with ingredients that change daily.

KAI Atami


Dinners consist of multi-course kaiseki meals that include visually pleasing dishes made with seasonal ingredients. Guests may choose between standard and special.


Guest are served Japanese set meals featuring whole sea bream cooked over rice in a stone rice cooker, along with condiments such as sesame and chopped Welsh onions.

KAI Atami Villa del Sol


French meals featuring the highest quality seafood caught that day are served. Each ingredient is individually prepared in the manner that best brings out its flavors.


Littleneck clam chowder cappuccino, bread with homemade confitures, scrambled eggs, and freshly squeezed orange juice are just some of the items featured in this auberge-inspired breakfast.

  • Only children over the age of 7 are allowed in the Villa del Sol restaurant.
  • Standard prices include half board.
  • Allergy Information

Hot spring

Baths are fed by Hashiriyu, one of the three oldest hot springs in Japan. The indoor bath is built from cypress logs, a classic Japanese design that infuses the space with a wood aroma. Meanwhile, the stylish Kengo Kuma-designed outdoor bath offers an ocean view.

  • Please note there are no elevators or wheelchair-friendly corridors in KAI Atami.
  • Rooms are connected to the bath halls by a roofed corridor. During cold weather, wear the provided footwear and tanzen kimono jackets to the halls.
  • Bath hall hours differ for men and women so as to allow for privacy.

Yuagari Lounge
Seikai Terrace

After a dip in the baths, guests are invited to cool off in this ocean-view lounge, enjoying the gentle ocean breeze blowing in while sipping on a refreshing Atami-inspired beverage.


Same day reservations available at the front desk.

KAI Activities

Every KAI establishment offers a selection of free activities designed to introduce guests to Japan's regional cultures. Atami is one of few cities in Japan that still has a thriving geisha culture, the seductive charms of which are still imparted to guests at the city's many geisha houses. Activities at KAI Atami revolve around this colorful Japanese tradition.

Atami geisha show

Guests get to watch an Atami geisha performance, and try their hand at a parlor game known as tosenkyo, which involves tossing paper fans at an ornate stand to create elaborate compositions.

Umeshu bar

Atami is known for its ume plums, which are used to make a sweet liquor called umeshu. Several seasonal umeshu, including one based on the oldest known recipe, are served in the Travel Library.



Check-in 15:00
Check-out 12:00
Rooms KAI Atami:16 Japanese-style Rooms
Villa del Sol:7 Western-style Rooms
Parking KAI Atami:30
Villa del Sol:7
Facilities KAI Atami:Shared bath halls / Yuagari Lounge / Travel Library / Shop / Spa
Villa del Sol:Restaurant / Salon

Travel Library

Every KAI establishment features a library consisting of books on the area's history, culture, crafts, and geography. Complimentary refreshments are also served.

KAI Atami

750-6 Izusan, Atami-shi,
Shizuoka 413-0002

KAI Atami Villa del Sol

759 Izusan, Atami-shi,
Shizuoka 413-0002

  • Please note that KAI Atami and the Villa del Sol are in two different locations, about a 5 minutes’ drive from each other. Make sure you arrive at the correct address.
  • Please note that KAI Atami and the Villa del Sol are in two different locations, about a 5 minutes’ drive from each other. Make sure you arrive at the correct address.