Kozantei Ubuya: Kaiseki, Room Types & Booking Tips for This Sought-After Ryokan

What Makes Kozantei Ubuya Special

Kozantei Ubuya (湖山亭うぶや) is a traditional luxury ryokan on the north shore of Lake Kawaguchiko, directly facing Mt. Fuji. According to Selected Onsen Ryokan, the property was founded in 1948 and has 51 rooms — all facing the lake and mountain. Twenty of those rooms have private open-air baths (露天風呂) on the balcony.

What sets Kozantei Ubuya apart from other Kawaguchiko properties is the combination of traditional ryokan service with one of the most dramatic natural backdrops in Japan. You eat kaiseki dinner in your room while looking at Fuji. You soak in your private rotenburo while looking at Fuji. You wake up and the first thing you see is Fuji — weather permitting.

Important: Kozantei Ubuya is not the same property as "Ubuya Hotel." Despite the similar name, they are separate establishments. Kozantei Ubuya is the older, traditional ryokan. If booking online, confirm you have the right property. For the other property, see our Ubuya Hotel guide. For broader options, see our Yamanashi ryokan guide or Konanso onsen ryokan.

Room Types: Private Onsen, Fuji Views, and What to Choose

Rooms with Private Rotenburo (20 Rooms)

According to Mount Fuji Hotels, 20 of the 51 rooms include a private outdoor bath on the balcony with a direct view of Mt. Fuji and Lake Kawaguchiko. These are the rooms that sell out first — often months in advance.

The private rotenburo experience is the main draw for couples and travelers celebrating special occasions. Soaking in hot spring water on your own balcony while watching the sun set behind Fuji is the kind of moment that justifies the premium.

Both Japanese-style tatami rooms and Western-style twin rooms are available with private baths. Japanese-style rooms include futon bedding laid out by staff in the evening.

Standard Japanese-Style Rooms

Standard rooms without private baths still face Mt. Fuji and the lake — the view is the same. The difference is that you use the communal onsen facilities instead of a private balcony bath. For many travelers, the communal baths (which also have Fuji views through anti-fog glass) are perfectly satisfying.

Standard rooms are more affordable and easier to book, making them a good option for travelers who want the Kozantei Ubuya experience without the private onsen premium.

Kaiseki Dinner and Breakfast

Dinner at Kozantei Ubuya is a multi-course kaiseki meal served in a private dining setting. The menu changes seasonally and typically features Yamanashi wagyu beef — served as steak or shabu-shabu — alongside local mountain vegetables, freshwater fish, and seasonal preparations.

The kaiseki experience here follows the traditional ryokan format: you change into the provided yukata (浴衣, cotton kimono) before dinner, and courses arrive one by one over approximately 1.5-2 hours. The pace is deliberate — this is not a meal to rush through.

Breakfast is also included and follows a traditional Japanese format with grilled fish, pickles, miso soup, rice, and small seasonal dishes. It is served in the same private setting.

If you have dietary restrictions (vegetarian, allergies, halal), communicate these when booking — the kitchen needs advance notice to prepare alternatives.

Onsen and Bathing Facilities

According to Mount Fuji Hotels, the communal bath facilities include seven different types of baths: outdoor rotenburo, reclining baths, jet baths, and indoor baths. The bathing area features anti-fog glass panels designed to maintain clear Mt. Fuji views even while steam rises from the water.

The communal baths are gender-separated and available to all guests throughout the day and night. For guests in rooms without private baths, these are the primary bathing facilities — and they are excellent.

Private baths are also available for reservation at the front desk, providing an option for guests who want privacy without booking a rotenburo room.

Booking Strategy and Practical Details

How Far Ahead to Book

Kozantei Ubuya is one of the most sought-after ryokan in the Fuji Five Lakes area. Many visitors on TripAdvisor report that rooms — especially those with private onsen — sell out 2-3 months in advance, and further ahead for peak seasons (cherry blossom in April, autumn foliage in November, New Year).

Phone reservations are recommended (0555-72-1145). Online booking is available through platforms like Japanican and Rakuten Travel, but phone bookings may access inventory that online platforms do not show.

Check-In, Check-Out, and Shuttle Service

Check-in is at 14:00 and check-out at 11:00. A free shuttle service operates from Kawaguchiko Station between approximately 15:00 and 18:00 — arrange pickup when booking. Outside shuttle hours, a taxi from the station takes about 10 minutes.

Pricing: Expect approximately ¥50,000+ per person per night with kaiseki dinner and breakfast included. Rates vary significantly by room type, season, and occupancy. Check booking sites for current pricing — rates from 2025 data may have increased.

Getting to Kozantei Ubuya from Tokyo

By highway bus (most common): Take the highway bus from Shinjuku Expressway Bus Terminal to Kawaguchiko Station — approximately 1 hour 45 minutes, about ¥2,000 (~$13) one way. From the station, use the free shuttle (15:00-18:00) or taxi (10 minutes).

By train: Take the JR Chuo Line limited express "Kaiji" from Shinjuku to Otsuki Station (about 1 hour), then transfer to the Fujikyu Railway to Kawaguchiko Station (about 50 minutes). The Fuji Excursion direct train from Shinjuku also reaches Kawaguchiko in about 2 hours.

By car: Drive via the Chuo Expressway to Kawaguchiko IC, then about 10 minutes to the ryokan. Free parking is available.

From	Route	Time	Cost
Shinjuku	Highway bus to Kawaguchiko	~1h 45min	~¥2,000
Shinjuku	Train (Kaiji + Fujikyu)	~2 hours	~¥3,500
By car	Chuo Expressway	~2 hours	Toll varies

Frequently Asked Questions

How far in advance do I need to book Kozantei Ubuya?

Book 2-3 months ahead minimum. Rooms with private onsen sell out fastest — for peak seasons (cherry blossom, autumn foliage, New Year), book 4-6 months ahead. Phone reservations (0555-72-1145) are recommended as they may access rooms not shown on online platforms.

Do all rooms have Mt. Fuji views?

Yes — all 51 rooms face Mt. Fuji and Lake Kawaguchiko. However, visibility depends entirely on weather. Fuji is clearest at dawn and during autumn and winter months. Cloud cover can obscure the mountain entirely — this is natural and not something the ryokan can control.

How much does Kozantei Ubuya cost per night?

Expect approximately ¥50,000+ (~$333+) per person per night with kaiseki dinner and breakfast included. Rates vary by room type (private onsen rooms cost more), season, and occupancy. Check Japanican, Rakuten Travel, or call directly for current pricing.

Is Kozantei Ubuya the same as Ubuya Hotel?

No — they are separate properties despite the similar name. Kozantei Ubuya (湖山亭うぶや) is the traditional ryokan established in 1948 with 51 rooms. Ubuya Hotel is a newer, modern lakefront property. When booking, confirm you have selected the correct establishment.

How do I get to Kozantei Ubuya from Tokyo?

Highway bus from Shinjuku to Kawaguchiko Station takes about 1 hour 45 minutes (¥2,000). From the station, use the free shuttle (15:00-18:00) or take a taxi (10 minutes). The Fuji Excursion train from Shinjuku is an alternative at about 2 hours.