Ryokans in Japan

About Hoshinoya Karuizawa

Seventy-seven villas in the Hoshino area of Naka-Karuizawa, about 80 minutes from Tokyo by Shinkansen and then a short taxi ride. Hot-spring water flows freely at the Hoshino Onsen Tombo-no-yu bathhouse and in a Meditation Bath kept for staying guests; the tubs in the villas use tap water.

  • OnsenYesFree-flowing, in the bathhouse
  • Bath in your roomEvery roomA bathtub in every villa
  • Private bathNot stated
  • TattoosAllowedNot restricted
  • MealsNot includedRates are room-only
  • Dietary needsSome dietsVegetarian kaiseki
  • ChildrenWelcomeUnder-12s can share a bed
  • Check-in and dinnerCheck-in 15:00; out 12:00
  • Getting thereFree shuttle from Naka-Karuizawa

Good to know before you book

  • Villa tubs are tap waterEvery villa has a bathtub with ordinary tap water; the hot-spring water is at the Tombo-no-yu bathhouse and the Meditation Bath.
  • The shuttle is reserved aheadThe free shuttle from Naka-Karuizawa Station runs for check-in and check-out, has limited seats and needs a reservation.
  • No children's vegetarian menuThe vegetarian kaiseki has no children's version; the regular kaiseki has child prices for ages 4–6 and 7–11.
Villas
77, for 1–4 guests
Dogs
Niwaroji dog villas take up to two dogs
Heating and cooling
Geothermal floor heating; natural ventilation in place of air conditioning
Parking
Free

Rooms and their baths

  • Indoor bath

    Mizunami (water side)

    57–68 m² · 1–4 guests · Triple, futon-style beds

    Bathtub with tap water; separate toilet

    Balcony over the water

  • Indoor bath

    Mizunami King

    48–65 m² · 1–2 guests · King

    Bathtub with tap water; separate toilet

    Wide terrace

  • Indoor bath

    Yamaroji (mountain side)

    54–67 m² · 1–3 guests · Twin or triple

    Bathtub with tap water; separate toilet

    Balcony and living room

  • Indoor bath

    Yamaroji King

    39 m² · 1–2 guests · King

    Bathtub with tap water; separate toilet

    The smallest villa; terrace

  • Indoor bath

    Yamaroji, mountain view, 2nd floor

    44–53 m² · 1–2 guests · Twin

    Bathtub with tap water; separate toilet

    Looks over the Wild Bird Sanctuary

  • Indoor bath

    Niwaroji Junior Villa Grand

    64–68 m² · 1–3 guests · Twin or triple

    Bathtub with tap water; separate toilet

    Enclosed small garden

  • Indoor bath

    Niwaroji Junior Villa Maisonette

    78–81 m², plus a patio and garden · 1–3 guests · Triple

    Bathtub with tap water; separate toilet

    Two floors

The fine print

Last checked November 12, 2026.

Onsen

Yes. Hot-spring water, free-flowing

The Hoshino Onsen Tombo-no-yu bathhouse, indoor and open-air, plus a guests-only Meditation Bath.

Bath in your room

Every room. A bathtub in every villa

Ordinary tap water: the onsen is the shared bathhouse.

Private bath

Not stated. Not stated by the ryokan

Tattoos

Allowed. Not restricted

Hoshino Resorts' group rule: staff may still turn someone away from a shared bath if they judge other guests would be frightened.

Meals

Not included. Not included: rates are room-only

Dinner and breakfast are booked separately after you book the room.

Dietary needs

Some diets. Vegetarian kaiseki, ¥21,780

No meat or seafood. There's no children's vegetarian menu.

Children

Welcome. Welcome; under-12s can share a bed

Up to the room's capacity.

Check-in and dinner

Check-in 15:00, check-out 12:00

Getting there

Free shuttle from Naka-Karuizawa Station, booked ahead

Naka-Karuizawa is 5 minutes from Karuizawa on the Shinano Railway. Seats are limited.

Meals

Nothing is included in the villa rate. Prices are per adult.

Dinner
"Yama no Kaiseki" at Kasuke, the dining room, ¥21,780. Ages 7–11 ¥13,200; ages 4–6 ¥4,235
Dinner, shabu-shabu
Beef shabu-shabu at Kasuke, ¥21,780, with the same child prices
Vegetarian dinner
Vegetarian kaiseki at Kasuke, without meat or seafood, ¥21,780. There is no children's version
Winter dinner
A yakuzen medicinal hotpot from 1 December to 22 February, ¥24,200
Casual dinner
Sonmin Shokudo, ¥9,800
French dinner
Yukawatan, in the Hoshino area, from ¥21,780. Preschool children are not admitted
Breakfast
Not stated by the ryokan

Baths

Tombo-no-yu bathhouse
Hoshino Onsen hot-spring water, free-flowing, in indoor and open-air baths
Meditation Bath
A hot-spring bath for staying guests only
Bath in your villa
A bathtub with tap water, and a separate toilet
Bath hours
Not stated by the ryokan
Private bath
Not stated by the ryokan

Getting there

Train
About 80 minutes from Tokyo by Shinkansen to Karuizawa, then about 15 minutes by taxi
Shuttle
Free between Naka-Karuizawa Station and the ryokan for check-in and check-out; seats are limited, so reserve ahead. Naka-Karuizawa is 5 minutes from Karuizawa on the Shinano Railway
Car
Parking is free

Who it suits

Couples and families
A forest villa within about 80 minutes of Tokyo; Mizunami villas sleep up to four
Dog owners
The Niwaroji dog villas take up to two dogs
Winter visits
Floor heating in every villa, and the yakuzen hotpot from December to February
Less suited
Travelers who want dinner inside the rate, or hot-spring water in the room

Place and season

Winter
The yakuzen hotpot is served from 1 December to 22 February
Nearby
The Wild Bird Sanctuary, which the 2nd-floor Yamaroji villas look over
Beds
Futon-style beds, about 200 × 105 cm

History

  1. 1915

    The first-generation owner of the Hoshino business opens the Hoshino Onsen hot spring in Karuizawa.

  2. Today

    The same spring feeds the Tombo-no-yu bathhouse beside the villas.

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Questions

Does Hoshinoya Karuizawa have an onsen?

Yes. Free-flowing Hoshino Onsen water fills the indoor and open-air baths of the Tombo-no-yu bathhouse, and there is a Meditation Bath for staying guests only. The bathtub in each villa uses tap water.

Can I bring my dog?

Yes, in the Niwaroji dog villas, which take up to two dogs.

How do I get to Hoshinoya Karuizawa from Tokyo?

Take the Shinkansen to Karuizawa, about 80 minutes, then a taxi for about 15 minutes. Or ride the Shinano Railway five minutes to Naka-Karuizawa and take the ryokan's free shuttle, which is reserved ahead.

Where do guests eat dinner?

At one of three places, each booked separately from the villa: Kasuke for kaiseki or beef shabu-shabu, Sonmin Shokudo for a casual meal, or the French restaurant Yukawatan in the Hoshino area.

Is there a vegetarian kaiseki?

Yes, a course without meat or seafood at ¥21,780 per person, tax and service included. It has no children's menu.

Which villa takes four guests?

Mizunami, on the water side: 57–68 m² with a balcony over the water, for one to four guests. Children under 12 can also share a bed, without a meal or bedding, up to the villa's capacity.