Forget about time and enjoy a sauna until morning Mimoza Retreat NASU New overnight stay plan "All Night Sauna Plan

Life Base Camp (Location: Nasushiobara City, Tochigi Prefecture; Representative Director: Atsuki Nakamura), a general incorporated association, will launch a new overnight plan "All Night Sauna Plan" at its nature experience-type accommodation facility "Mimoza Retreat NASU" that allows guests to use the private sauna facility, which is normally offered on a time basis, "throughout the night" (from 20:00 on the day of check-in to 8:00 the following day). The "All Night Sauna Plan," a new overnight plan that allows guests to use the private sauna facilities "throughout the night" (from 8:00 p.m. on the day of check-in to 8:00 p.m. the following day), which are normally available on a time-based system, will be fully launched on April 22, 2026 (Wednesday).

The plan includes a sauna where you can enjoy our original hojicha (roasted green tea) wax, a tourmaline water bath that is smooth and comfortable on the skin, an open-air bath with a 360° panoramic view of the virgin forest, and a comfortable and spacious forest conditioning space all night long. In addition, an entire private villa is available for use, where you can spend time in the afterglow of the sauna. You can spend your time freely, including the possibility of getting a good night's sleep in the villa as you would in a normal stay. A new style of stay, "sauna night," recommended for sauna lovers, is now available for those who want a special stay that includes time for rest and relaxation.

About the private sauna facility "Mori no Tenku Sauna & Open-air Bath

View of the entrance of the facility

Sauna room made of Japanese cypress

Gently wrapping your burning body

Tidying space with a sense of openness

The private, fully reserved spa facility is a three-story building with treehouse specifications. The open spa is exciting just by stepping inside and inviting you to a special time, with a Finnish sauna stove made by MISA and the original hojicha (roasted green tea) self-heating sauna with its fragrant aroma, allowing you to enjoy an authentic sauna to your heart's content. The tourmaline water bath gently wraps your body after a long day in the sauna and refreshes your skin with its smooth and comfortable feel. In the spacious relaxation area with relaxing chairs and hammocks, you can enjoy a supreme time of "nothingness" as you become one with the great nature of Nasu.

The open-air baths, with their subtle scent of wood, reflect the colors of the sky and forest, and the breeze, creating a tranquil moment of detachment from everyday life.

A 360-degree panoramic view of the virgin forest stretches above your head. It is a luxurious experience to view the forest that changes its expression from season to season and even the stars at night from the bathtub. The sauna and the warmth of the hot water will not only heal your body, but will also fill you with a deep sense of wellbeing. We hope you will enjoy it.

About the new "All Night Sauna Plan

View of the sauna room

Enjoy the starry sky at night

Be healed by the illuminated forest

Original hojicha (roasted green tea)

In the previous plan, the usage time was limited to 80 minutes per couple. However, in response to customer feedback that "it is difficult to make a reservation because the daytime slots are full," "I want to use the sauna for a long time," and "I want to relax in the quiet night time," this newly introduced plan allows you to enjoy the sauna all night (from 8 pm on the day of check-in until 8 am the next day) at your leisure. The new plan allows you to enjoy the entire night (from 8:00 p.m. on the day of check-in to 8:00 a.m. the following day) at your own leisure. In order to allow you to enjoy the sauna to the fullest without being restricted by time constraints, we have kept the plan simple by not including evening breakfast or the gyro ride experience, and have made it even more affordable.

After taking your time to heat up your body in the sauna room, cool down comfortably in the tourmaline water bath. Then, move to the conditioning space and breathe in the clean air of Nasu Highland, while letting your body and mind relax and regenerate. You can also freely use the private villas at Mimoza Retreat NASU, so when you want to rest your body, you can recover deeply indoors and then return to the open-air bath or sauna. You can repeat this cycle as many times as you like.

You can also enjoy the luxury of being enveloped by nature while lying back in a reclining chair or a hammock. Soak in the open-air bath and gaze up at the stars that fill the sky above you.

As night falls, the forest grows quieter, and even the sound of the wind and trees relaxes your mind. This special plan is a must-see for sauna lovers, who can immerse themselves in "todo" without worrying about time. Enjoy the ultimate retreat experience brought to you by the great nature of Nasu over the course of one night.

Recommended for the following people

Those who want to enjoy sauna to their heart's content at their own pace without worrying about anyone else.

Those who want to enjoy "sauna night" all night long with friends.

Those who want to spend an extraordinary time surrounded by the great nature of Nasu and the starry sky, which can never be experienced in the city.

From 19,800 yen per person per night

About Mimoza Retreat NASU

Bright and spacious bedrooms

Enjoy the great nature of Nasu

Bright and spacious bedroom

Spacious living room

Mimoza Retreat NASU" is an all-private villa accommodation facility featuring mimosa colors, where guests can stay while being surrounded by the great nature of Nasu Highlands.

After soaking up the heat in the sauna, guests can return to their villas to relax and spend time talking with friends and family. The interior design uses accent cloths to create a relaxing atmosphere. Indirect lighting allows you to enjoy a more moody and relaxing stay at night. The bedrooms are divided into Western-style and Japanese-style rooms, making it ideal for multiple groups to stay together. The layout of the living room and bedrooms is appropriately separated, allowing each to have their own private space while still being able to relax and spend time together in the villa.

As a "sauna where you can stay," the villa offers a one-of-a-kind stay that combines lodging and a retreat experience.

Luxurious all-night sauna stay surrounded by the nature of Nasu Highlands

The "All Night Sauna Plan" allows you to enjoy the sauna throughout the night, offering an unprecedented "sauna experience you can stay in". Relax your body and mind in the embrace of the forest and stars, talk with friends, and enjoy the tranquility of the sauna. All of these are special moments that can only be experienced at Mimoza Retreat NASU. Please enjoy a new kind of sauna trip in Nasu Kogen.

Detailed Information

Name: Mimoza Retreat NASU

Location ： 178-4 Toda, Nasushiobara-shi, Tochigi

Contact ： 0287-74-5517, info@lbcg.net

Plan start date ： Wednesday, April 22, 2026

Price ： From 19,800 yen per person per night

Official website ： https://lbcg.net/mimoza/staysauna/

Reservations and inquiries： Official website or by phone