Overview

Leave the city behind and spend time among the forests and open landscapes of Oku-Nikko at Nikko Astraea Hotel. Set at an elevation of around 1,400 metres inside Nikko National Park, this is the only resort hotel in the Kotoku Onsen area.

Cool mountain weather makes the hotel an appealing summer escape, while deep snow transforms the surroundings into a base for cross-country skiing during winter. In spring and autumn, you can explore wetlands, waterfalls, and forest trails before returning for seasonal Japanese cuisine and a long soak in a natural sulfur spring.

The spacious grounds bring you close to the landscape throughout your stay. Look toward Mount Nantai, watch the colours change across the garden, or step outside after dark to enjoy the clear mountain sky.

Accommodation

Choose from Western Twin Rooms, Japanese Rooms, a Japanese-Western Special Room, and four rooms created for stays with your dog.

The 37.3-square-metre Western Twin Rooms face the garden and include two beds, a sitting area, and a private bathroom. An additional bed can be arranged when you need more sleeping space.

Japanese Rooms come in ten and twelve-tatami layouts. Tatami flooring, low seating, shoji screens, and futon bedding give you a more traditional place to rest. Some include a private bathroom and toilet, while others include a toilet and use the shared hot spring baths for bathing. Views depend on the room location, with selected rooms facing the garden and surrounding woodland.

For more space, the 77.6-square-metre Special Room combines two semi-double beds with a raised tatami area. This Japanese-Western layout gives you separate places to sleep, sit together, and relax after a day outdoors.

Four dog-friendly twin rooms include a pet enclosure, raised food stand, bowls, wet wipes, deodorising spray, waste bags, and a lint roller. These rooms accommodate you and your dog without separating you from the main hotel experience.

Your room includes free Wi-Fi, a television, refrigerator, yukata, towels, toothbrushes, slippers, and basic toiletries. All accommodation is non-smoking.

Dining

Enjoy dinner at Restaurant Monterosa, where large windows look across the courtyard and forest. Seasonal Japanese kaiseki courses bring together mountain produce, local ingredients, and water drawn from Oku-Nikko’s natural surroundings.

Dinner changes throughout the year to reflect the season. Nikko yuba may appear alongside vegetables, fish, soup, rice, and carefully arranged small dishes. The measured pace of a multi-course meal gives you time to enjoy each flavour without rushing back out into the cold or darkness.

Breakfast is also served in the restaurant. A plated Japanese set provides warm rice, soup, fish, vegetables, and changing side dishes, helping you begin the day with a satisfying meal before hiking or skiing.

Onsen and Wellness

Ease tired legs in natural sulfur water brought from Nikko Yumoto Onsen. The shared bathhouse has separate areas for men and women, each with a large indoor bath and access to the open-air bath, Mori no Sei.

The spring emerges clear before contact with the air changes its appearance. Depending on the water and weather conditions, you may see tones ranging from milky blue to aqua or emerald green.

With a source temperature of 77.7°C and a pH of 6.4, the slightly acidic spring is associated with relief from fatigue, muscle and joint discomfort, stiff shoulders, sensitivity to cold, bruises, and sprains. The free-flowing bathing system lets you experience the distinctive character and scent of Oku-Nikko’s sulfur water.

You can use the indoor and open-air baths from 3:00 PM until 9:00 AM the following morning. The long overnight opening period gives you time for an evening soak beneath the sky and another bath before breakfast.

Day-use bathing normally runs from 12:30 PM to 3:30 PM, with final entry at 3:00 PM.

Guests with Tattoos

You can use the shared indoor and open-air hot spring baths if you have tattoos.

Facilities

Spend quiet time in Lounge Haitosu with coffee and views of the grounds. In the evening, Club Shiroi Piano offers drinks and karaoke when reserved in advance.

The Mori no Miyako shop carries Nikko souvenirs, original items, and pickles made at the hotel. Restaurant Monterosa serves breakfast and dinner, while the banquet hall accommodates larger meals and events. The Roman multipurpose room supports meetings, workshops, and indoor group activities.

Free Wi-Fi is available in your room, the lobby, and the restaurant. On-site parking is available when you arrive by car, and cross-country ski equipment can be rented during the winter season.

Activities

In winter, step outside and begin exploring Kotoku’s cross-country ski routes. Courses for different ability levels run through snow-covered woodland and open areas around the hotel. Equipment rental makes it possible to try the activity without bringing a complete set of gear.

During the warmer months, follow walking routes through Kotoku and toward the wetlands of Senjogahara and Odashirogahara. These open landscapes give you views of mountain plants, woodland, and the peaks of Oku-Nikko.

Ryuzu Falls and Yudaki Falls add dramatic water scenery to a day outdoors, while Lake Yunoko and Lake Chuzenji offer lakeside walks and broad mountain views. Kotoku Farm is also nearby for an easy outing through the highland countryside.

A longer trip can take you to Kegon Falls or the shrines and temples of central Nikko. After sightseeing, return to the quieter highlands for dinner and another sulfur-spring soak.

Additional Features

Check-in begins at 3:00 PM, and check-out is by 10:00 AM. The hotel’s elevation keeps summer temperatures relatively mild, with daytime highs often around 25°C even during the warmest part of the season.

Dog-friendly accommodation is limited to four designated rooms, so you need to select the correct room category when booking. Other animals cannot stay in these rooms.

Cross-country skiing depends on snowfall and course conditions. Outside winter, hiking, nature walks, wildlife watching, and scenic drives give you many ways to experience Oku-Nikko’s changing landscape.