Looking into Hotel Harvest Kyukaruizawa

I've been looking into inns and campsites that seem easy to reach without a car, moving from area to area as I go.

This time I looked into Hotel Harvest Kyukaruizawa. It apparently has a hinoki cypress indoor bath, an open-air bath, and even a natural hot spring rock bath. As an indoor type, I got curious and thought, “Could I spend a whole day just inside this place?”

The Short Version

It has a hinoki cypress indoor bath, a garden open-air bath, and a natural hot spring rock bath, and it's apparently about a 12-minute walk from Karuizawa Station, so it looked like an inn where you could aim for a hot spring stay even without a car.
As for Rakuten Mobile signal, the official tool gave it the highest rank, “AAA.”

I've put the details below.

A small, exclusive inn surrounded by the Karuizawa woods

The hotel is in Karuizawa Town, Kitasaku District, Nagano Prefecture, and according to the official website, it has “10 rooms.” I couldn't find a breakdown by room type, though.

Here's the basic info.

Check-in / check-out: 15:00 / 11:00, apparently
Room types: a Twin (Western-style) room of 51 m² for 2 guests, and a Standard (Western-style) room of 41 m² for 4 guests
Room atmosphere: it seems there's a spacious balcony and large windows, so you can feel the green of the woods
Price: I couldn't find specific room rates on the official website. There is a note about a “Best Rate Guarantee,” which says the official site's plans will be the cheapest compared with other online booking sites
Booking: online reservations are available on the official website, and there also seem to be pages for checking, changing, and canceling a booking

The listed amenities include bath towels, face towels, shampoo and conditioner, body soap, a toothbrush, a razor, slippers, a hair dryer, and a samue. For a relaxed stay at a hotel, it looked easy to travel light.

Komorin

Only 10 rooms might be nice for indoor types like me who want a quiet stay. But it seems the rates aren't listed officially, so I think checking on the booking page would be the way to go.

From the hinoki indoor bath to the rock bath: a closer look at the baths

The large hot spring bath is apparently on the 2nd floor of the main building's common wing. It's described as having a hinoki cypress indoor bath, an open-air bath facing the garden, and a rock bath that uses natural hot spring water.

Hours: 6:00 to 10:00 and 15:00 to 24:00, it seems
Water type: listed as a simple hot spring (weakly alkaline, hypotonic)
Rock bath water: only the rock bath uses actual hot spring water, and it looks like the water is brought in from Kose Onsen
Sauna: according to a notice, it was renovated in July 2026 and löyly (sauna steam) was introduced
Private bath (family bath): 15:00 to 22:00, 2,200 yen per hour, same-day reservations only, apparently

One thing to watch out for is the private bath. The official website has a notice titled “Notice of Suspension of Family Bath Use” (dated October 1, 2026), and I couldn't confirm how long the suspension lasts. If the private bath is the main draw for you, it would be a good idea to check the official info beforehand.

Also, I couldn't confirm on the official website whether day-use bathing is available or how much it costs.

Facilities that matter to an indoor type like me

It looks like I'd spend a lot of time inside the hotel, so I checked the facilities too.

Indoor heated pool (Kur Zone): on the 1st floor of the main building and apparently free to use. It's 15 m × 4 m, and there's also a mist sauna. Hours are 7:00 to 10:00 and 15:00 to 21:00
NADESHICO SPA (beauty treatments): 14:00 to 22:00, and it seems reservations are required
Restaurants: there are “Hyakumi Issai Avant” and “Irodori DINING Sai.” The lounge “yu-ra-ri” is apparently open for breakfast only, for a limited period
Other: it seems there's karaoke (paid), table tennis (paid), laundry (paid), and a shop

With hot springs, a pool, and spa treatments, it gave me the impression of a place where you can have a comfortable stay without going outside. On the other hand, I couldn't confirm things like free Wi-Fi, whether pets are allowed, or the number of parking spaces and parking fees on the official website.

Can you get there without a car? Sorting out access

As a paper driver, access is a big deal for me. From what I found, these routes were listed.

Train + walking: about a 12-minute walk from the north exit of Karuizawa Station on the Hokuriku Shinkansen
Highway bus: about 180 minutes from Shibuya Mark City by Tokyu highway bus, then about a 12-minute walk from Karuizawa Station. There's a bus stop on the hotel grounds, but a note says the bus may not stop there during busy periods such as the Obon holidays
Car: about 12 km from Usui-Karuizawa I.C. on the Joshin-etsu Expressway
Shuttle: the official access page has a “Welcome Bus Information” section, but the text only says “There is currently no information available to view.” I couldn't confirm whether a shuttle runs

If you take the Shinkansen to Karuizawa Station, it seems to be a walkable distance from there. It might be a bit tough on days when you have a lot of luggage, but I thought it's on the easier side to reach without a car.

Rakuten Mobile Signal Conditions

I entered the hotel's location (Karuizawa Town, Kitasaku District, Nagano Prefecture) into the official “my Area Connection Simulator.” The overall result came back as the highest rank, “AAA.”

It's just the result from the official tool, but as someone who uses Rakuten Mobile, it seems like a useful reference point. That said, I haven't been able to check how the signal comes through in specific spots like the guest rooms or the baths. If you're curious, please check with the official Rakuten Mobile tool yourself too.

Komorin

When I hear “in the Karuizawa woods,” I get worried about the signal, but the result was AAA. As someone who wants to use my phone leisurely in the room, that's a relief.

See Rakuten Mobile Details

Wrapping Up

To sum up, my impression of Hotel Harvest Kyukaruizawa is that it's an inn where you can enjoy a hinoki cypress indoor bath, an open-air bath, and a natural hot spring rock bath, within walking distance of Karuizawa Station, which makes a hot spring stay easy to plan even without a car.

It also seems to have a pool, spa treatments, and a renovated sauna, so it looks like a good fit for indoor types who want to relax inside the hotel. On the other hand, I couldn't confirm things like room rates, whether there's a shuttle, whether day-use bathing is possible, or how long the family bath suspension lasts, so I think it's safest to check the latest info on the official website before booking.

As for Rakuten Mobile signal, the official tool's result was “AAA.” If you're curious, please check it with your own eyes using the official Rakuten Mobile tool too.

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