Naganuma Onsen (ながぬま温泉)

Naganuma Onsen: The Salt-Rich Healing Waters and Genghis Khan Capital of Hokkaido

Just a 45-minute drive from the urban sprawl of Sapporo and only 30 minutes from New Chitose Airport, Naganuma Onsen (ながぬま温泉) serves as a refreshing gateway to Hokkaido’s pastoral heartland. Known for its high-pressure, naturally flowing saline springs and its legendary mutton barbecue (Genghis Khan), Naganuma is where locals go to recharge their bodies and souls. For international travelers, it offers a perfect “countryside” experience without the need for long-distance travel. The landscape is characterized by rolling hills, vast rice paddies, and clear blue skies, providing a serene backdrop for one of the most mineral-rich thermal baths in the region. Whether you are a foodie looking for the best lamb in Japan or a weary traveler seeking therapeutic relief, Naganuma Onsen is a hidden gem that delivers authentic Hokkaido hospitality.

Key Information Table

The Healing Waters: The Power of Ancient Salt

Naganuma Onsen is famous for its incredible volume of water, flowing naturally at a rate of over 1,100 liters per minute. The spring quality is a Strong Sodium-Chloride Spring, which means the salt concentration is much higher than standard baths. This creates a “Salt Pack” effect on the skin, preventing sweat from evaporating and keeping the body core warm for an unusually long time—a quality locally known as “Atsuyu” (Heat-retaining water). The water is slightly yellowish and has a distinct oceanic scent. It is scientifically proven to improve peripheral circulation, making it a favorite for those recovering from sports injuries or chronic fatigue. The facility features several large indoor tubs with varying temperatures and an outdoor bath where you can feel the fresh breeze of the Ishikari Plain.

Inbound Traveler Guide: Tattoos, Language, and Payments

• Tattoo Policy: Naganuma Onsen is a community-focused municipal facility. While large, visible tattoos are traditionally restricted, the staff are generally understanding of international cultural differences. If you have medium-sized tattoos, covering them with waterproof tape is highly recommended. For those with extensive ink, the facility offers a “Private Family Bath” (Kashikiri-furo) which can be reserved for an hourly fee, ensuring a stress-free experience.
• Language Support: Signage for basic onsen etiquette (washing before entering, no towels in water) is available in English, Chinese, and Korean. Most staff use translation apps for check-in procedures.
• Cashless & Connectivity: Major credit cards and IC cards (Suica/Kitaca) are accepted at the hotel front desk and the restaurant. The bath entry machine, however, is cash-only. Free Wi-Fi is available in the lobby and guest rooms.
• Solo Travelers: Very safe and welcoming. The hotel has compact single rooms that are excellent value for money.

Dietary Needs: Genghis Khan and Farm-Fresh Vegetables

Naganuma is synonymous with Genghis Khan (Jingisukan), Hokkaido’s soul food of grilled mutton.
The Meat Lover’s Paradise: The onsen restaurant is famous for serving three different types of marinated lamb from the town’s top producers. It’s an interactive dining experience where you grill the meat and vegetables on a helmet-shaped iron skillet.
Vegetarian/Vegan Survival: While Naganuma is a “meat town,” it is also a massive producer of soy, corn, and onions. The Maoi-no-Oka Roadside Station nearby offers a “Farmer’s Market” where you can buy fresh, ready-to-eat seasonal vegetables. The onsen restaurant can provide vegetable-only sets or Udon noodles if requested, but vegans should check for fish-based dashi in the sauces.

Walking Guide & Scenic Spots

Naganuma’s charm lies in its “slow life” atmosphere.
Maoi-no-Oka Lookout: A short walk or drive from the onsen, offering a 360-degree view of the Ishikari Plain and the distant mountains of Yubari.
Naganuma Maoi Roadside Station: A must-visit for souvenirs and local snacks. It’s one of the most popular “Michi-no-Eki” in Hokkaido.
Blueberry & Fruit Picking: During the summer, several farms around the onsen offer fruit-picking experiences that are very popular with families.

Practical Travel Tips: Rental Car is King

While there are buses from Sapporo and Kitahiroshima, they are infrequent. Renting a car from New Chitose Airport is the most efficient way to visit.
Pro Tip: If you are visiting the F Village (Hokkaido Ballpark) to see a baseball game, Naganuma Onsen is only 20 minutes away, making it a perfect post-game relaxation spot. In winter, the roads are wide and well-plowed, but beware of “whiteouts” caused by wind blowing across the flat fields.

2025-2026 Latest Updates

In 2025, Naganuma Onsen upgraded its “Sauna World,” adding a new outdoor cold plunge pool that uses chilled groundwater. They have also introduced a “Workation Lounge” with high-speed internet and ergonomic chairs, catering to digital nomads who want to mix thermal healing with remote work. For 2026, a new “Gourmet Bus” is planned to connect the onsen with local wineries and cider houses in the area.

Safety & Manners

The water at Naganuma is very strong; do not soak for more than 15 minutes in your first session to avoid “Yu-ataru” (thermal shock). Always dry yourself thoroughly before entering the locker room to keep the floors safe for others. In winter, be careful of the “black ice” in the parking lot—it looks like wet pavement but is actually extremely slippery ice.