Natsuse Onsen (夏瀬温泉)

Introduction: The Ultimate Luxury Hideaway and the Emerald Soul of Dakigaeri Gorge

Deep within the emerald-clad mountains of the Semboku district, at the end of a private 6-kilometer forest road that follows the turquoise currents of the Tama River, lies Natsuse Onsen (夏瀬温泉). This is one of Japan’s most exclusive and sophisticated “One-Inn” (Ikken-yado) sanctuaries, centered around the world-class “Miyako-wasure” lodge. The name “Miyako-wasure” literally means “to forget the capital,” and it perfectly encapsulates the experience: a complete dissolution of the modern world into a landscape of primeval birch forests and rushing river rapids. For the international traveler, Natsuse Onsen offers a profound encounter with “Luxury Seclusion.” It is a place to soak in private, mineral-rich waters while surrounded by the fire-red maples of autumn or the deep white snow of winter, breathe in the high-oxygen air of a protected wilderness, and indulge in some of Japan’s most refined “Earth-to-Table” kaiseki cuisine. If you seek a destination where time is measured only by the flow of the river and the shifting mists, Natsuse is your ultimate northern sanctuary.

Key Information Table

The Healing Waters: The “Spirit Silk” of the Sotsuda Valley

The water at Natsuse Onsen is geologically distinct in the Semboku basin, tapping into a deep, high-pressure vein that yields water of incredible clarity and purity. It is primarily a Sodium-Chloride / Sulfate / Hydrogen Carbonate Spring.
The Purity: The water flows at a 100% natural rate (Gensen Kakenagashi) directly into the tubs at its source temperature of approximately 45°C. No heating, no cooling, and no chemicals are added.
The Beauty Effect: The bicarbonate ions act as a natural cleanser, gently emulsifying skin oils and revealing a smooth, radiant glow—the definitive “Bijin-no-yu” (Beauty Water) sensation.
The Private Experience: Unique to Natsuse, every single guest room at Miyako-wasure features its own private outdoor Rotenburo carved from volcanic stone or fragrant cypress. Soaking here in autumn, as the maple leaves of the Dakigaeri Gorge turn fire-red reflected in the turquoise river below, is a spiritual experience of the highest order. The minerals are particularly effective at soothing the nervous system, providing a “mental reset” as much as a physical one.

Top Recommended Stay: Miyako-wasure

• Natsuse Onsen Miyako-wasure (夏瀬温泉 都わすれ): Address: 84 Sotsuda Natsuse. The pinnacle of wellness in Akita. This boutique luxury inn features only 10 rooms, each designed with a mix of traditional Japanese aesthetic and modern Western comfort. The dining hall is a masterclass in local ingredients, serving the legendary **”Akita Beef”** and seasonal mountain vegetables (sansai) gathered from the surrounding hills. It is the premier choice for international couples and honeymooners seeking absolute privacy and architectural authenticity. Staying here allows you 24-hour access to your private mineral tub and the chance to wake up in a world of absolute silence.
• Kakunodate Samurai District Guesthouses (Nearby): For those who prefer a mix of history and nature, staying in central Kakunodate and visiting Natsuse for its premium day-soak is a popular strategy.

Must-Visit Neighborhood Spots: Gorges and Samurai Towns

Dakigaeri Gorge (抱返り渓谷): The onsen is located at the deepest end of this spectacular 10km gorge. Known as the “Yabakei of Tohoku,” it features turquoise river water, dramatic limestone cliffs, and the “Mikaeri-no-taki” waterfall.
Kakunodate Samurai District: A 30-minute drive away. One of Japan’s best-preserved samurai neighborhoods, famous for its black-walled residences and weeping cherry trees.
Lake Tazawa (Tazawako): Located 40 minutes away. Japan’s deepest lake (423.4m), famous for its sapphire-blue water and the golden statue of Princess Tatsuko.

Local Gastronomy: The Kingdom of the “Meya” Bounty

Food at Natsuse is sophisticated, honest, and deeply tied to the land.
Akita Beef: High-quality local wagyu known for its tenderness and rich flavor. Try the “Beef Shabu-shabu” at the resort.
Inaniwa Udon: One of Japan’s three most famous noodles, known for its thin, hand-stretched texture and smooth finish.
Vegetarian/Vegan Survival:
For Vegans: This is a top-tier destination for plant-based eaters. The lodge is world-class in its ability to handle dietary restrictions. You must notify them at least 7 days in advance. They can prepare a stunning “Sansai Feast” featuring local tofu and mountain ferns. The local “Semboku Tofu” is exceptionally rich. We also recommend trying the local “Iburi-gakko” (Smoked Pickles)—a 100% vegan specialty with a deep, smoky flavor.

Cultural & Historical Context

The name “Natsuse” refers to the “Summer Rapids” of the river. Historically, this area was a secret healing ground for the Satake samurai lords who fled to the mountains for “Misogi” (purification). The lodge Miyako-wasure was established to revive the ancient tradition of “Toji” (healing) in a luxury setting, proving that the mineral energy of the earth could be paired with the highest standards of modern hospitality. Today, Natsuse remains a symbol of rural Akita’s resilience—a place that preserves its traditional soul while welcoming global explorers seeking a “Spiritual and Mineral” detox.

Practical Travel Tips for International Visitors

• Tattoo Policy: Miyako-wasure is a world-class luxury resort and is extremely tattoo-friendly. Since all rooms have private onsens, guests with ink can soak without any concerns. Small tattoos are ignored in the public tubs, and large pieces are generally accepted if the guest is respectful.
• Connectivity: Zero mobile signal inside the valley. High-speed Wi-Fi is standard in all rooms and the lobby, making it a spectacular “Workation” destination. However, prepare for a profound “Digital Detox” on the forest trails.
• Cashless & Payments: Fully modern. Major credit cards, Apple Pay, and Google Pay are accepted throughout the resort. The local taxi service from the station also accepts cards.
• Access: The final 6km road is a private forest road. Self-driving is discouraged during heavy snow months; use the hotel’s 4WD shuttle service from JR Kakunodate Station for the safest arrival.

2025-2026 Latest Updates

In 2025, Natsuse Onsen launched the “Gorge Meditation Stay,” providing guests with traditional Japanese meditation mats and forest bathing guides to use on the riverfront terrace. For the 2026 season, a new “Eco-Cycling” path will connect the lodge with the entrance of Dakigaeri Gorge, allowing visitors to explore the valley on electric bikes.

Safety & Manners

In the onsen, always rinse your body thoroughly before entering your private tub. Because the water is high-quality and clear, any residue is easily visible. If you are exploring the gorge trails, carry a bear bell—this is prime territory for native wildlife. Finally, respect the quiet of the forest; Natsuse is a place where people value the sound of the river, so keep noise levels to a minimum in the outdoor baths after 9:00 PM.