Notices: Regarding the opening date of Soba Kappo SAI
Soba Kappo SAI will open starting with dinner service on June 7, 2026.
【Notice】 Regarding Delivery of Messages Leading to Phishing Sites
Please beware of suspicious e-mails pretending to be from Hoshino Resorts. There have been e-mails sent under the subject such as "Urgent Contact," "Important Notice," "Identification Confirmation," etc. We never ask for important information such as credit card numbers, expiration dates, PINs, etc. via e-mail. If you find a suspicious email as above, please delete it without clicking on the URL in the e-mail.

Hoshino Resorts KAI Kusatsu

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Activities

KAI Cultural Discovery
- No reservation required
- Free of charge
- For all ages
Availability：
All year
At this local accommodation building reminiscent of the Tomioka Silk Mill, you can experience "Joshu Zaguri"—a traditional silk-reeling technique that has been passed down since the Edo period.
*Every KAI establishment offers a selection of free activities designed to introduce guests to Japan’s regional cultures.
Details
KAI Massage
- Reservation required
- 16 years or older
Availability：
All year
We offer highly therapeutic massages by nationally certified staff. After bathing, blood circulation is improved and the body can relax more easily. A massage before dinner also helps with digestion.
Details
Town Stroll Kit
- No reservation required
- For all ages
Availability：
All year
Open up a map to find hidden spots, or take a relaxing break between hot spring hops. This kit has everything you need to fully immerse yourself in the charms of Kusatsu.
Details
The Tunnel Bridging Ryokan and Onsen Town
- No reservation required
- Free of charge
- For all ages
Availability：
All year
Step along the forest path and through the tunnel, and you will find yourself in the bustling hot spring town. From the historic Kusatsu Onsen to a hot spring inn nestled in rich, natural woods, immerse yourself in a whole new way to experience travel, discovering two distinct sides of Kusatsu.
Details