Kose Onsen
Wooden shelving with woven bathing baskets and sliding door to small veranda at Kose Onsen, Nagano
Partially enclosed wooden onsen bath with slatted roof and tub overlooking wooded hillside at Kose Onsen, Nagano
Sunlit indoor onsen with stone flooring and wooden ceiling at Kose Onsen in Nagano, Chūbu region, Japan
Spacious wooden dining hall with tables and chairs at Kose Onsen in Nagano Chūbu Japan
Cozy lounge with wooden beams and upholstered chairs at Kose Onsen, Nagano, Chūbu, Japan
Wooden footbridge over stream with autumn foliage at Kose Onsen in Nagano
Wooden vanity and mirror beside bright entryway and genkan at Kose Onsen, Nagano, Chūbu, Japan

Kose Onsen

7.8
This Ryokan has an overall rating of 7.8/10, based on 149 reviews. ? Our score combines two signals: 50% based on traveler sentiment and guest feedback found online, and 50% based on our internal on-site evaluation plus ratings from verified travelers on our platform, who must provide proof of stay.
? This ranking compares properties in the same region. It is based on the overall rating and the number of reviews, using a weighted score so properties with more review data are ranked more fairly.
Check-in from 2:00 PM / Check-out until 10:00 AM
Forest Surroundings Riverside Location Countryside Escape Quiet Village Mountain Setting Hot Spring Bath
Staff 9,0/10
Facilities 8,0/10
Cleanliness 8,0/10
Comfort 6,0/10
Value for money 8,0/10
Location 7,0/10

Ryokan highlights

A secluded hot spring ryokan in Karuizawa known for forested riverside calm and abundant natural baths.

Secluded Forest SettingWooded riverside location feels quiet and removed from Karuizawa’s busier resort areas.
Abundant Natural OnsenHot spring baths are known for plentiful flowing water from the source.
Relaxing Bath ExperienceLarge communal bath is a standout for travelers seeking a simple, soothing soak.
Near Shiraito FallsUseful base for visiting Shiraito Falls and enjoying Karuizawa’s surrounding nature spots.
Traditional Ryokan FeelOffers a classic countryside inn atmosphere rather than a polished modern resort style.
Convenient by CarBest suited to drivers, with easier access to sights around greater Karuizawa.

Who is this ryokan best for?

Recommended stay1 nightScenery and onsen are the main drivers here: arrive in the afternoon, settle into the baths, eat dinner on-site, sleep early, have breakfast, then continue to Shiraito Falls or central Karuizawa before moving on.
Trip-planning verdict: Kose Onsen Hotel works best as a quiet 1-night nature-and-onsen stay on a Karuizawa route, not as a long sightseeing base.

Know before booking

Remote settingIt sits outside Karuizawa’s main station and shopping areas, so access is slower and evening options are limited.
Risk of overstayThe ryokan suits a short retreat, but the immediate area does not support many dense walkable attractions for several full days.
Old-school propertyTravelers expecting polished luxury may find the atmosphere more traditional and dated than upscale.

Food & drinks

Verified as the secluded Kose Onsen Hotel in Karuizawa; meals appear to be reservation-based Japanese or Western set dinners and breakfasts, with stronger dining variety found in central Karuizawa nearby.

Dining Room (on-site)
on-site

Reservation-based hotel meals with seasonal Japanese or Western sets.

  • Japanese dinner setfoodSeasonal multi-course style meal.
  • Western dinner setfoodWestern-style set by reservation.
  • Japanese breakfastfoodTypical ryokan morning meal.
  • Tea servicedrinkIn-room or meal-time hot tea.
Pyrenees (nearby)
nearbyabout 15 min drive

Popular wood-fire meat restaurant in central Karuizawa.

  • Aged beeffoodSlow-roasted over a fireplace.
  • Shinshu porkfoodLocal pork grilled over wood fire.
  • Roast chickenfoodJuicy signature roast style.
  • WinedrinkStrong pairing focus.
Bistro Panache (nearby)
nearbyabout 15 min drive

Cozy French bistro for lunch or dinner in Karuizawa.

  • Course lunchfoodAppetizer, main, dessert.
  • Fish or meat mainfoodDaily-style bistro plate.
  • Homemade breadspecialtyServed with set meals.
  • CoffeedrinkEspresso or coffee with courses.

Access, transport and nearby sights

A secluded hot spring ryokan in the forested Nagakura area of Karuizawa, typically reached most easily from Karuizawa Station by taxi or pre-arranged pickup if available.

Distances are approximate and calculated from the ryokan coordinates. Travel times may vary depending on route, traffic and schedules.

Should you choose this ryokan?

A secluded onsen stay in the hills of Karuizawa, Kose Onsen Hotel suits travelers who want quiet, nature, and a traditional ryokan feel more than polished resort luxury. It is especially appealing for an unplugged escape, but less ideal if you need easy station access or modern upscale finishes.

5 reasons to choose this ryokan best points
  • Peaceful forest settingThe ryokan sits in a notably secluded part of Nagakura with a river in front and very few buildings nearby, so the atmosphere feels calm and removed from busy central Karuizawa.
  • Private onsen without extra fussIt offers a reservable private hot spring bath at no extra charge, which is a strong perk for couples, families, or guests who prefer more privacy than a public bath.
  • Authentic retro ryokan moodThis is a good fit if you want tatami rooms, futon bedding, and an old-school onsen inn atmosphere rather than a slick contemporary hotel style.
  • Hot spring is the real highlightThe property is known for abundant natural spring water and a traditional bath experience, making the stay feel centered on soaking and slowing down rather than just sleeping overnight.
  • Meals add to the stayDinner and breakfast are a meaningful part of the experience here, with seasonal set meals that make the ryokan feel more complete than a room-only countryside stay.
5 reasons not to choose this ryokan watch-outs
  • You really need a carIt is about a 15-minute drive from JR Karuizawa Station, and the secluded location is less convenient if you plan to move around by train, bus, or on foot.
  • Not a luxury-modern propertyTravelers expecting fresh designer interiors or high-end resort polish may find the building more dated and nostalgic than refined.
  • Rooms can feel fairly simpleThe appeal is traditional and nature-focused, so guests wanting large stylish rooms or extensive in-room features may find the accommodations modest.
  • Meals require planningMeal service is tied to advance reservation, so it is not the best choice for travelers who want total flexibility for spontaneous dining in town.
  • Quiet comes with trade-offsBecause there are no shops or lively streets right around the ryokan, evenings are best for resting and bathing rather than browsing cafes, bars, or convenience stores nearby.

Ranking around this ryokan in Nagano

Showing 5 above and 5 below the current ryokan. The full ranking loads only when you click or hover over this block.

Current position: 140th out of 166 ryokans in Nagano.

Rank Ryokan Rating Reviews
135th Yutorelo Tateshina Hotel with DOGS 7.8/10 43
136th Umeoka Ryokan 7.9/10 252
137th Chuokan Shimizuya Ryokan 7.9/10 298
138th Komoro Grand Castle Hotel 7.4/10 13
139th Matsutake Sansō 7.8/10 83
140th Kose Onsen Current ryokan 7.8/10 149
141st Kaneki Hotel 7.8/10 177
142nd Izumiso 7.4/10 20
143rd Sagirisou 7.8/10 478
144th Tateyama Prince Hotel 7.7/10 94
145th Sachinoyu Hotel Shiga Kogen 7.6/10 119
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