Unazuki Onsen
Gateway to the Japanese Alps and Kurobe Gorge
Unazuki Onsen was discovered in 1923 during the construction of the Kurobe Gorge Railway, built to transport materials for hydroelectric power development in the remote Kurobe Gorge. Workers discovered hot springs bubbling from the gorge depths, and engineers piped the 90°C water 7 kilometers to the current onsen town location at the gorge entrance. This marked one of Japan's few modern-era onsen discoveries rather than ancient traditional springs.
The resort town developed rapidly in the 1920s-30s as the railway opened to tourists, transforming Unazuki from a construction camp to an onsen destination. The town's strategic location - where the Kurobe River emerges from the deep gorge onto the Toyama Plain - made it the natural starting point for gorge tourism. Post-war development added luxury ryokan, and the town became known for combining onsen relaxation with access to Japan's most spectacular mountain railway journey.
Today, Unazuki serves approximately 1 million visitors annually, split between onsen guests and Kurobe Gorge Railway passengers. The town pipes hot spring water from Kurobe Gorge's depths, maintaining unique 'gorge water' character. The alkaline waters and dramatic Alpine setting distinguish Unazuki from seaside or urban onsen. The town successfully integrated hydroelectric industrial heritage with tourism, and the Kurobe Gorge Railway - now purely tourist-focused - became the region's signature attraction alongside the healing waters.
Key Highlights
- Gateway to spectacular Kurobe Gorge Railway
- Alkaline hot spring water piped from deep gorge
- Dramatic Northern Alps mountain scenery
- Large public bath Unazuki Onsen Souyu with gorge views
- Riverside rotenburo and foot baths
- Bridge and promenade illuminations in evening
Access Information
Location
Unazuki Onsen, Kurobe, Toyama 938-0282, Japan
Nearest Stations
- • Unazuki-Onsen Station (Toyama Chiho Railway) - 5 min walk to town center
- • Kurobe-Unazuki Onsen Station (Hokuriku Shinkansen) - 25 min by local train
Opening Hours
Onsen town accessible 24 hours. Souyu public bath: 10:00 AM - 10:00 PM. Foot baths: 24 hours (outdoor). Kurobe Gorge Railway: operates late April - late November only (seasonal, winter closures). Ryokan day-use bathing: varies, typically 11:00 AM - 3:00 PM with reservation.
Admission Fee
Souyu public bath: ¥610. Foot baths: free. Ryokan day-use: ¥1,000-2,000. Overnight stays: ¥15,000-40,000 per person with meals.
How to Get There
From Toyama City
Take Toyama Chiho Railway Dentetsu Main Line from Dentetsu-Toyama to Unazuki-Onsen (60 minutes, ¥1,320). Or drive via Route 8 and 54 (60km, 80 minutes). Direct access makes day trip feasible but overnight stay recommended.
1.5 hours
From Tokyo/Nagano
Take Hokuriku Shinkansen to Kurobe-Unazuki Onsen Station (2 hours from Tokyo, ¥13,500; 1 hour from Nagano, ¥6,000). Transfer to Toyama Chiho Railway local line to Unazuki-Onsen (25 minutes, ¥680). Total journey manageable for weekend trips.
2.5 hours from Tokyo
From Kanazawa
Take Hokuriku Shinkansen to Kurobe-Unazuki Onsen Station (40 minutes, ¥4,730), then local train to Unazuki-Onsen (25 minutes, ¥680). Or drive via Hokuriku Expressway (100km, 90 minutes). Combine with Tateyama-Kurobe Alpine Route for multi-day Toyama touring.
2 hours
Tips & Visiting Guide
Make the most of your visit with these helpful tips and guidelines.
Kurobe Gorge Railway
The main attraction: scenic railway journey through 20km of dramatic gorge with 40+ tunnels and bridges. Operates late April-late November only. Round-trip to Keyakidaira terminus takes 3 hours (¥3,960). Reserve seats early for peak seasons (Golden Week, autumn colors). Open-air cars offer thrilling but cold experiences. Many visitors arrive day before railway trip, soak in onsen, ride railway next day.
Spring Water Quality
Unazuki's alkaline water (pH 7.7, sourced at 90°C from gorge depths) is colorless, odorless, and known as 'beauty water' for its skin-softening properties. The water is piped 7km from the gorge, cooling naturally. Beneficial for muscle pain, arthritis, and stress relief. The soft water feels gentle compared to stronger sulfur or acidic springs. Most ryokan have both indoor and riverside outdoor baths.
Souyu Public Bath
The town's main public bath, Unazuki Onsen Souyu, features large indoor and outdoor baths with gorge views. Modern facility opened 2017 with excellent amenities (¥610 entry). Open 10 AM-10 PM, perfect for day visitors or supplementing ryokan baths. The expansive outdoor bath overlooks Kurobe River. Nearby foot baths free along riverside promenade - pleasant for couples or families.
Town Promenade
Pleasant riverside walking path connects ryokan district, offering multiple free foot baths, riverside views, and photo spots. The vermillion Shin-Yamabiko Bridge iconic town symbol. Evening illuminations light bridges and promenade (sunset-10 PM year-round). Yukata strolls after dinner traditional. The compact town easily explored on foot in 30-45 minutes.
Seasonal Beauty
Spring (late April-May): Fresh green mountains, railway season opens, cherry blossoms. Summer (June-August): Lush gorge, cool mountain climate. Autumn (October-early November): Spectacular fall foliage on gorge railway - peak season, book months ahead. Winter (December-March): Snow-covered mountains, quiet onsen atmosphere, railway closed. Each season offers distinct appeal.
Local Cuisine
Ryokan kaiseki features Toyama Bay seafood (despite mountain location - fresh fish delivered daily), local river fish, mountain vegetables, and Toyama's famous white shrimp. Unazuki Beer (local craft brew) available at some establishments. Limited dining outside ryokan - most visitors eat at accommodations. Nearby Kurobe City offers additional restaurant options.
Accommodation Selection
Luxury: Enraku (large resort with multiple bath types), Yamano-Ha (boutique ryokan). Mid-range: Kurotaki, Kurobe-so. Budget: Minshuku and small ryokan (¥10,000-12,000). All offer indoor/outdoor baths and meals. Most have river or mountain views. Book well ahead for autumn foliage season (October). Many ryokan offer railway ticket packages.
Practical Information
Railway operates seasonally only (late April-late November) - verify dates. Winter visits focus purely on onsen (railway closed, some ryokan offer discounted rates). English signage limited but tourist information at station helpful. Cash important. Combine Unazuki with Toyama City sightseeing or Tateyama-Kurobe Alpine Route for comprehensive Toyama touring. Allow 2 days minimum (arrival evening, railway next day, depart afternoon).
FAQ
How long should I stay at Unazuki Onsen?
Most visitors stay one night to fully experience the hot spring baths and mountain atmosphere. A day trip is possible, with 3-4 hours allowing time for bathing and lunch. Two-night stays let you explore nearby Kurobe Gorge Railway at a relaxed pace. Weekend visits book months ahead, so plan accordingly. The area is best experienced with an overnight stay at a traditional ryokan.
What makes Unazuki Onsen special?
It's the gateway to Kurobe Gorge, Japan's deepest V-shaped gorge, offering dramatic mountain scenery. The hot spring water is alkaline, known for making skin smooth and silky. The town sits at the gorge entrance with stunning views of the Kurobe River and surrounding mountains. Traditional ryokan with outdoor baths overlooking the gorge provide unforgettable experiences. It's one of Toyama Prefecture's premier onsen resorts.
When is the best time to visit Unazuki Onsen?
Autumn (late October to early November) offers spectacular fall foliage in the gorge with vibrant reds and golds. Spring (April-May) brings fresh green scenery and blooming flowers. Summer (June-September) is pleasant for gorge exploration with warm weather. Winter (December-March) sees heavy snowfall creating a serene, snowy landscape, though the gorge railway operates on a limited schedule. Each season offers distinct beauty.
Can I visit the public baths without staying overnight?
Yes, several day-use onsen facilities are available. Unazuki Onsen Station has a free footbath with gorge views. Saryokan day-use facility costs ¥600 and offers indoor and outdoor baths. Some ryokan offer day-use bathing for ¥1,000-2,000, but reservations may be required. The riverside public bath Saryokan is the most popular day-visit option with locals and tourists.
How do I combine Unazuki Onsen with Kurobe Gorge Railway?
The railway station is adjacent to Unazuki Onsen town, making them perfect companions. Most visitors arrive at Unazuki, take the morning train into the gorge (1 hour 20 minutes one-way to Keyakidaira), return by afternoon, then relax in the onsen. Book railway tickets in advance during peak seasons. This combination showcases both dramatic gorge scenery and relaxing hot spring culture in one trip.
What are the water temperatures at Unazuki Onsen?
The source water temperature is approximately 60-90°C (140-194°F), making it a genuine hot spring. Bath temperatures are adjusted to comfortable 40-42°C (104-108°F) for bathing. The water is alkaline with a pH of around 7.7, giving it skin-softening properties. The high-quality water requires no additional heating, flowing naturally from the source. Some outdoor baths may be slightly cooler in winter.
Are there mixed-gender baths at Unazuki Onsen?
Most facilities have separate gender baths, which is standard in modern Japanese onsen. Some ryokan offer private family baths that can be reserved for couples or families. Outdoor rotenburo at individual ryokan are typically gender-separated. Always check with your accommodation for specific bathing arrangements. Swimsuits are not worn in traditional onsen baths.
Is Unazuki Onsen suitable for families with children?
Yes, many ryokan welcome families and provide family rooms and private baths. The Kurobe Gorge Railway excursion is exciting for children. Some outdoor baths may be too hot for young children, so supervise carefully. Most ryokan can provide child-sized yukata and meals adapted for children. The peaceful mountain setting offers a different pace from busy cities, which some children enjoy.
How do I get to Unazuki Onsen from Tokyo?
Take the Hokuriku Shinkansen from Tokyo to Kurobe-Unazuki Onsen Station (2.5 hours, ¥12,000). From there, transfer to the local Toyama Chiho Railway for 20 minutes to Unazuki Onsen Station (¥680). Total journey is about 3 hours. Alternatively, take the shinkansen to Toyama City, then the Chiho Railway (about 1 hour). Many ryokan offer pickup from Kurobe-Unazuki Onsen Station if booked in advance.
What should I bring to the onsen?
Most ryokan provide yukata robes, towels, and toiletries, so you can travel light. Bring your own toiletries if you prefer specific brands. Small towels for washing are usually provided. Tattoos may not be permitted in some facilities - check in advance. Bring comfortable clothes for relaxing in your room. If visiting day-use facilities, bring your own towel or rent one for ¥200-300.
Are tattoos allowed in Unazuki Onsen baths?
Policies vary by facility. Many traditional ryokan prohibit visible tattoos in communal baths due to cultural associations. Some places allow small tattoos if covered with special patches. Private family baths don't have tattoo restrictions. Always ask your accommodation about their tattoo policy before booking. Younger, modern facilities tend to be more lenient than traditional establishments.
What dining options are available in Unazuki Onsen?
Most visitors eat at their ryokan, which typically includes elaborate kaiseki dinner and Japanese breakfast. A few local restaurants serve Toyama specialties like white shrimp, firefly squid, and local sushi. Convenience stores near the station provide snacks and basics. The dining scene is limited compared to cities, so ryokan meals are the main attraction. Some ryokan offer day-use meal plans with bathing.
Can I visit Unazuki Onsen as a day trip?
Yes, but you'll miss the full experience. Arrive by mid-morning, ride the Kurobe Gorge Railway (2-3 hours round trip), return for a soak at a day-use facility, and depart by early evening. This makes for a full but rewarding day. However, staying overnight lets you enjoy evening and morning baths, traditional kaiseki dinner, and the peaceful mountain atmosphere. The town quiets beautifully after day-trippers leave.
What's the average cost for an overnight stay?
Budget ryokan start around ¥10,000-15,000 per person with two meals. Mid-range ryokan cost ¥20,000-30,000 per person. Luxury ryokan with premium rooms and meals can exceed ¥40,000-50,000 per person. Prices increase significantly during autumn foliage season and peak summer months. Weekends cost more than weekdays. Rates typically include dinner and breakfast, making them good value considering the quality.
Is Unazuki Onsen accessible for elderly or mobility-impaired visitors?
Accessibility varies by ryokan. Some modern facilities have elevators and barrier-free rooms, while traditional buildings may have stairs and step-up baths. Many ryokan have ground-floor rooms available on request. The town itself has some hills and slopes. When booking, inform the ryokan of any mobility needs so they can prepare appropriate accommodations. Some baths have handrails, but traditional facilities may be challenging.
What are the main attractions near Unazuki Onsen?
Kurobe Gorge Railway (5 minutes walk) is the primary attraction, offering scenic train rides through dramatic gorge scenery. Yamabiko Trail is a riverside walking path with tunnel passages and views. Shin-Yamabiko Bridge provides excellent gorge photography. Several hiking trails branch from the town into surrounding mountains. The nearby Kurobe Dam (accessible via different route) is Japan's tallest dam and another engineering marvel.
Do I need to make reservations in advance?
Yes, especially for ryokan stays during peak seasons (autumn foliage in November, summer holidays, and Golden Week). Popular ryokan can book up 3-6 months ahead for autumn weekends. Kurobe Gorge Railway tickets should also be reserved in advance during peak times. Weekday visits outside peak season offer more flexibility. Day-use onsen facilities generally don't require reservations, but calling ahead is courteous.
What's the etiquette for using onsen baths?
Wash thoroughly at shower stations before entering the bath - this is essential etiquette. Tie long hair up to keep it out of the water. Don't bring the small wash towel into the bath, or place it on your head. Enter the bath naked after washing completely. Don't swim or splash. Keep conversation quiet and respectful. Dry off before returning to changing rooms. Follow these rules to be a respectful guest.
Can I visit in winter, and what should I expect?
Yes, winter visits offer a magical snowy landscape and fewer crowds. Heavy snow falls December through March, creating beautiful scenery. However, Kurobe Gorge Railway operates only April through November, so winter visits focus purely on onsen relaxation. Snow viewing from outdoor baths (yukimi-buro) is enchanting. Roads are well-maintained, but check weather conditions. Winter rates may be slightly lower than peak autumn season.
Are there any free activities in Unazuki Onsen?
Yes, the free footbath at Unazuki Onsen Station offers gorge views and is popular with visitors. Strolling along the Kurobe River and crossing bridges provides free scenery. The Yamabiko Promenade walking path (free) follows the river through tunnels and offers excellent views. Simply walking the onsen town and enjoying the mountain atmosphere costs nothing. Many viewpoints along the gorge are freely accessible.
Nearby Attractions
Explore more wonderful destinations in the same prefecture.
Kurobe Dam
Japan's tallest dam at 186 meters, a monumental feat of engineering built through the Northern Japan Alps. The dam's powerful water discharge and surrounding mountain scenery create one of Japan's most dramatic landscapes.
Kurobe Gorge Railway
Scenic trolley train journey through one of Japan's deepest gorges, offering spectacular mountain views and seasonal beauty from spring to autumn.
Tateyama Kurobe Alpine Route
A spectacular mountain route crossing the Northern Japan Alps using cable cars, ropeways, and buses. Famous for its spring 'Snow Walls' reaching 20 meters high, the route offers stunning alpine scenery and engineering marvels.