Norikura Kogen is a highland plateau at around 1,500 m on the southern edge of the Northern Alps, and a quieter neighbor to the famous Shirahone Onsen.
Tucked into its forest sits Ryokuzanso, a small, family-run mountain inn whose main draws are a genuinely milky sulfur spring and two open-air baths you can have entirely to yourself.
Why Ryokuzanso stands out:
- Two hand-built wooden private open-air baths — one hexagonal, one square — facing the mountains
- Cloudy, milky-white sulfur water (pH 3.2) with a strong sulfur aroma
- Views of Mt. Norikura from the grounds and the room veranda
- Free beer, juice, and tea in the room, plus a hearty Shinshu mountain-food dinner
If a properly milky sulfur soak with an open-air bath to yourself matters more to you than polished interiors, Ryokuzanso delivers exactly that.
Ryokuzanso, Norikura Kogen
| Address | 3936 Azumi, Matsumoto-shi, Nagano 390-1520, Japan |
|---|---|
| Phone | +81-263-93-2223 |
| Official Website | ryokuzan.com |
| Day-use Bathing | ¥1,000 · 11:00–14:00 · Reservation required, irregular closing days — please confirm before visiting |
| Check-in / Check-out | From 15:00 / By 10:00 |
| Credit Cards | May be accepted for overnight stays; day-use is cash only — confirm in advance |
| Overnight Rate | From approx. ¥20,000 per person (2 meals included; varies by season and plan) |
Getting There from Tokyo — Access Guide
Norikura Kogen is reachable from Tokyo in a day using trains and a local bus, though the final leg runs infrequently and is worth planning around.
🚄By Train + Bus (Recommended)
Take the JR Limited Express “Azusa” from Tokyo (Shinjuku) to Matsumoto Station (approx. 2 hours 40 minutes). Transfer to the Alpico Kamikochi Line to Shinshimashima Station (approx. 30 minutes), then take the Alpico bus bound for Norikura Kogen (approx. 50 minutes) and get off at the “Bansho” stop, a 3-minute walk from the inn. Total travel time: approximately 4.5–5 hours. Bus schedules change with the season, so check timetables in advance. The inn can also arrange transfers within the Norikura Kogen area for bus travelers — ask when booking.
🚗 By Car
From Matsumoto IC, follow Route 158 toward Kamikochi, then turn onto Prefectural Route 84 at Maekawado (approx. 50–60 minutes). Free parking is available.
Winter tires are essential during the snow season, as roads around the plateau are regularly snow-covered.
| Route | Tokyo (Shinjuku) → Matsumoto → Shinshimashima → “Bansho” bus stop |
|---|---|
| Train | JR Ltd. Express “Azusa” to Matsumoto (~2h40) |
| From Matsumoto | Kamikochi Line to Shinshimashima (~30 min) + Alpico bus (~50 min) |
| JR Pass | ⚠️ Partial coverage — the Azusa is covered; the Kamikochi Line and the local bus are not |
A Modest Mountain Inn Facing Mt. Norikura
Left: Mt. Norikura rises above the inn on a clear day. Right: The exterior on arrival — a little dated, but solid.
The inn sits just off Norikura Kogen’s main road. Inside, it has the homey feel of a family-run guesthouse: no frills, but spotlessly clean and comfortable.
A relaxed, minshuku-style interior, kept impressively clean.
The inn also makes a handy base for the plateau. From roughly July to October, a shuttle bus climbs to Tatamidaira at about 2,700 m on Mt. Norikura; Zengoro Falls is 5–10 minutes away by car, and Ushidome Pond, known for its “upside-down Norikura” reflection, is about 10 minutes away.
The Rooms
🛠 Rooms Have Been Renovated Since My Visit
I stayed in 2024. The inn has since renovated its guest rooms (spring 2025): every room now has its own toilet and washbasin and is much larger, at roughly 18–25 tatami mats. The photos and table below show the room as I found it, so expect a more spacious, comfortable stay today.
| Toilet | Shared at my 2024 visit (now en suite in every room) |
|---|---|
| Refrigerator | Available |
| Air Conditioning / Heating | Available |
| Wi-Fi | Available |
| Television | Available |
| Towels & Yukata | Provided |
Left: My compact tatami room (pre-renovation). Right: The veranda beyond the window, with a view of Mt. Norikura.
Left: Beer, juice, and tea are all provided free of charge — a thoughtful touch. Right: A welcome sweet.
My old room was small but cozy, with a compact heater and an air purifier. The toilet was in the corridor, but it was for my room’s exclusive use, so it caused no inconvenience.
The Hot Springs — Milky Sulfur Water, Two Private Open-Air Baths
Ryokuzanso has two indoor baths and two private open-air baths, all fed by the same sulfur spring. The open-air baths stand in a separate building, a short walk outside.
🕐 Bathing Hours
Open-air baths: from check-in until 21:00, and 6:30–9:30 in the morning (private use).
Indoor baths: private by room from check-in until 22:00, then gender-separated from 22:00 until 9:30 the next morning.
At pH 3.2, this is about as acidic as orange juice. The combination of acidity and hydrogen sulfide is what gives sulfur springs like this their cloudy white color and vivid smell.
Indoor Baths — Clean and Powdery
Left: The washing area sits between the changing room and the tub. Right: A clean, wood-paneled bathing space.
There are two indoor baths, entered through a changing room with the washing area just inside. The water is faintly milky, with a strong sulfur aroma and a slightly powdery feel — somewhat reminiscent of nearby Shirahone Onsen.
Hexagonal Private Open-Air Bath — The Highlight ★
Left: The hexagonal tub. Right: Mountains spread out ahead.
This is the reason to stay. Both open-air baths are built of wood with a lovely handmade feel, and you get them entirely to yourself. Mountains stretch out before you, which makes the hexagonal bath a wonderful place to linger.
The water runs a little hot, and I couldn’t cool it with added water; a slightly cooler soak would have been perfect, but it remains a memorable bath.
Square Private Open-Air Bath — Best at Sunrise
The second bath is square (pictured at the top of this page). I used it in the morning just as the sun rose, and the bright light over the mountains made for a wonderfully refreshing start to the day. Like the hexagonal bath, it runs hot, but the setting more than makes up for it.
Dining — Hearty Shinshu Mountain Cooking
Meals center on local Shinshu (Nagano) ingredients. Dinner is served from 18:00, and breakfast at 7:00, 7:30, or 8:00.
Dinner
Left: Basashi (horse sashimi), a regional rarity. Right: Salt-grilled rainbow trout.
Left: Tempura fried fresh to order, served with matcha salt. Right: A warming duck hot pot.
The tempura arrives freshly fried, and the duck hot pot, along with rice and miso soup, is filling.
Dessert is a Shinshu apple. It isn’t flashy, but it leaves you thoroughly satisfied, exactly as a mountain inn should.
Breakfast
Left: A classic breakfast of salad, fish, kinpira, yogurt, and gentle yudofu (simmered tofu). Right: A soft hot spring egg to spoon over rice.
Final Thoughts
Ryokuzanso is a quiet, unassuming inn where the star attractions are the ones that matter: a truly milky sulfur spring, private open-air baths with mountain views, and a satisfying Shinshu dinner.
That morning soak in the sunlit square bath is still one of my favorite hot spring memories, and with the renovated rooms, first-time visitors can enjoy it in even more comfort.
Ryokuzanso is ideal for visitors who:
- Want to experience a proper milky sulfur spring
- Prefer to soak in a private open-air bath at their own pace
- Enjoy open, scenic bathing with mountain views
- Plan to use Norikura Kogen as a base and add a hot spring stay
A humble mountain inn, but a sunrise soak in the square bath alone makes the trip worthwhile.