Yanagisawa Onsen (柳沢温泉)

Introduction: The Secluded Whispers of the “New Nasu” Frontier

Tucked away in the quiet, forested valleys of the Nasu Highlands, away from the bustling crowds of Yumoto, lies Yanagisawa Onsen (柳沢温泉). This destination is defined by its absolute stillness and its reputation as a “Healing Hermitage.” Historically home to the legendary **Yanagisawa Kosen Shimizuya**, this spring has been a sacred site for those seeking to escape the modern world for over a century. While the landmark inn has recently transitioned its operations, the geothermal source remains a point of intense interest for mineral enthusiasts. For the international traveler, Yanagisawa offers a “Deep Highlands” experience—a place to explore the intersection of volcanic bicarbonate science and the quiet majesty of the Tochigi forests. It is the ultimate destination for the “Slow Travel” connoisseur who values the atmosphere of an era slowly fading into legend.

Key Information Table

The Healing Waters: The “Bicarbonate Silk” of the Woods

The water chemistry at Yanagisawa Onsen is geologically unique for its **Bicarbonate** concentration.
The Emulsifying Effect: Carbonate ions act as a biological cleanser, softening the skin’s outer layer and effectively washing away the “dust of the city.”
The Therapeutic Depth: Because it is a “Kosen” (mineral spring) source, the mineral balance is distinct from the surface sulfur springs of the peaks, offering a more stable and soothing mineral flux for those with sensitive skin or circulatory conditions.
**Important Note:** The historic Shimizuya facility is currently **closed** (as of 2025). Bathers are encouraged to explore the neighboring **New Nasu Onsen** area, which draws from similar deep-ground aquifers, providing a similar therapeutic profile in a modern setting.

Top Recommended Bases: Highlands and Resorts

• Grand Mercure Nasu Highlands Resort & Spa (Nearby): Address: 3254 Takakuhei. The premier choice for international travelers. It recently achieved the **”Green Key” international eco-certification** in early 2026 and offers a massive public onsen lounge with forest views.
• TOWA Pure Cottages: Located just 35 minutes on foot from the Yanagisawa district, offering luxury transparent domes and private cottage hot springs.
• Nasu Onsen Sanraku: A high-end luxury ryokan with 100 years of history, providing a formal alternative base for exploring the secluded Yanagisawa forest trails.

Must-Visit Neighborhood Spots: Glass and Goblins

Nasu Stained Glass Museum: A stunning stone building nearby featuring world-class 19th-century glass art—a highly popular photo spot for international guests.
Nasu Heisei-no-Mori: Only a 15-minute drive away. A former Imperial retreat now open as a pristine forest park for guided ecological walks.
Nasu Highland Park: For families, this nearby amusement park offers over 40 rides with spectacular views of the volcano range.

Local Gastronomy & Souvenirs

Food in the Takaku-otsu district is defined by its “Noble Dairy” heritage.
Nasu Milk Gelato: Made with the highest quality milk in Kanto, available at Minamigaoka Dairy (10-min drive).
Vegetarian/Vegan Survival:
Matsuoka (松おか): Located just 15 minutes away, this is a 100% Organic Vegan restaurant in a private home. They specialize in macrobiotic plates that recreate meat textures using local grains.
Alma Cafe: A cozy spot nearby serving vegan-friendly samosas and fresh seasonal salads.
Vegan Tip: Buy the three-year fermented **”Nasu Miso”**—naturally vegan and a historical staple—at the “Roadside Station Yuai-no-Mori.”

Cultural & Historical Context: The “New Nasu” Legacy

Yanagisawa Onsen is a central part of the **New Nasu (Shin-Nasu)** development, which began in 1923 when the Imperial Family established their summer villa in the region. This boosted the area’s reputation from a local medicinal spot to an elite international resort zone. While the historic inns have evolved, the spirit of “Noble Seclusion” remains—it is a place for those who wish to be found only by the spirits of the trees.

Practical Travel Tips for International Visitors

• 2026 Status Alert: As the historic Shimizuya has closed, do not attempt to visit without a confirmed reservation at a neighboring facility.
• Cashless Progress: While remote, the larger resorts like Grand Mercure accept **all major credit cards**. However, small forest cafes remain **strictly cash-only**.
• Transportation: A rental car is highly recommended for this area. Taxis from Kuroiso Station cost approx. 5,000 – 7,000 JPY one-way.

2025-2026 Latest Updates

Accommodation Tax 2026: Starting in **October 2026**, Nasu Town will implement a new “Stay Tax” (100–300 JPY per night) to fund the maintenance of forest trails and tourist signage.
Nasu Winter Market: The 2026 edition will feature a special “Highlands Cider” stall featuring local apples and Yanagisawa mineral waters.

Safety & Manners

Bear Awareness: The Takaku-otsu district is a prime habitat for Asiatic Black Bears. **Always carry a bear bell** and talk loudly when hiking the forest trails.
Etiquette: In the quiet highlands, noise travels far. Please respect the “Silence of the Forest” after 9:00 PM when staying in local villas.