Opening in June 2026

KAI Kusatsu

 
Gunma Kusatsu Onsen
A private tunnel connects this nature-secluded hot spring ryokan to the historical Kusatsu hot spring resort area, allowing guests to enjoy baths in both intimate and lively settings.
 
 
Gunma Kusatsu Onsen
A private tunnel connects this nature-secluded hot spring ryokan to the historical Kusatsu hot spring resort area, allowing guests to enjoy baths in both intimate and lively settings.
 

A private tunnel connects this nature-secluded hot spring ryokan to the historical Kusatsu hot spring resort area, allowing guests to enjoy baths in both intimate and lively settings.
Highlights

13ONSEN

Kusatsu is home to several hot springs known for their skin-cleansing properties, two of which feed the ryokan's baths—including an outdoor bath decorated with stunning rock formations.

23LEISURE

While the ryokan offers quietude and elegance, the resort area just outside is a lively stretch of modern and traditional establishments offering distinctive bathing experiences. Enjoying the best of both worlds is one of the pleasures of spending several nights here.

33KAISEKI

Dinners begin with a rillette of boar and runner-bean miso. The main is chicken thighs cooked in a nutrient-rich broth until it is soft enough to fall off the bone, followed by an invigorating congee prepared in the soup with tangy black vinegar.

Rooms

KAI Signature Rooms offer a deeper dive into the local culture.The "Silk Art Room" at KAI Kusatsu is an exquisite space featuring an impressive wall of handcrafted silk art, highlighted by glossy silk thread dots.

Local
Attractions

Directions

Hoshino Resorts KAI Kusatsu

464-690 Shirane, Kusatsu, Agatsuma, Gunma 377-1711

Mapcode: 341 446 751*34

Hotel
Details

Guest Rooms

94 Rooms

Room Occupancy

1–4 Guests

Restaurant

Onsen

Meeting Room

Available

Check-in / Check-out

2:30 PM / 11:00 AM

Wi-Fi

Wi-Fi is available in all areas and is free of charge.

Bed share

Up to 6 years old, until room capacity.

Pets

Allowed

Bookings will only be accepted from within Japan. For further information, please check the Japanese website pages.

Special Arrangements

Celebratory Box(Reservations required, until 4:00PM the day before)

Shuttle service

Not Available

Parking

Private free parking is available without reservation.

EV charging

Available 24 hours

200V/6kw×4 units

Reservation

Application available after lodging reservation

External guests allowed (priority given to overnight guests) Registration at the front desk on the day of arrival

Online Payments

Visa, Mastercard, American Express, Diners Club, JCB

Onsite Payments

Cash, Credit Cards

Water dispenser

Available

Facilities

  • Restaurant
  • Café / Lounge
  • Spa / Massage
  • Playroom
  • Pool
  • Onsen
  • Public bath
  • Meeting Room

General

  • Smoking is prohibited in the entire building (smoking area available)