Nekoma Onsen (猫魔温泉)

Introduction: The Golden “Infinity” Springs of Lake Hibara

Perched on the dramatic shoreline of Lake Hibara, Nekoma Onsen (猫魔温泉) is a destination where natural beauty meets anime-inspired architectural splendor. Its name, “Nekoma” (Cat Demon), is derived from local legends of a goblin cat, but the reality is far more serene. Nekoma is unique as the only artesian (self-springing) onsen in the Urabandai area, meaning its waters flow to the surface under their own natural pressure. For many international visitors, the primary draw is the lobby of the Urabandai Lake Resort, which bears a striking resemblance to the “Infinity Castle” from the globally famous Demon Slayer series. Whether you are soaking in the iron-rich “Golden Waters” or listening to the haunting melodies of the shamisen in the lobby, Nekoma provides a visceral encounter with Japan’s “Gothic” mountain culture.

Key Information Table

The Healing Waters: The “Golden Alchemy” of Iron

Nekoma Onsen is geologically prized for its high iron content. Classified as a Sodium-Chloride Sulfate Iron spring, the water emerges clear but turns a distinctive golden or reddish-brown hue upon contact with oxygen.[15, 16]

The “Bathing Silk” and Therapeutic Iron

The combination of chloride salts and iron creates a unique tactile experience—the water feels “sticky” yet leaves the skin feeling incredibly soft. Balneologically, this is known as a “Women’s Onsen” due to its historical use in treating iron deficiency and sensitive circulation. The high mineral density ensures that your core temperature stays elevated, which is vital after a day of ice fishing on Lake Hibara or skiing the Nekoma Mountain powder.

Top 5 Recommended Stays

• Urabandai Lake Resort – Goshiki no Mori: Address: 1171-1 Hibara. The cultural hub of the area. Famous for its “Infinity Castle” lobby and the “Hibarami-no-yu” outdoor bath which overlooks the lake.
• Urabandai Lake Resort – Nekoma Rikyu: The luxury wing of the resort. It offers private check-in, premium French-Japanese fusion dining, and a higher level of quietude for the discerning traveler.
• Hoshino Resorts Bandaisan Onsen Hotel: Located on the opposite slope but connected via the Nekoma Mountain ski link. A leader in Aizu culture and premium wellness services.
• Urabandai Kogen Hotel: A heritage-style luxury hotel overlooking Mt. Bandai, known for its high-quality French cuisine and sophisticated forest views.
• EN RESORT Grandeco Hotel: A ski-in/ski-out paradise at the highest altitude in the region. Their springs are gentle, clear, and perfect for post-ski relaxation.

The “Infinity Castle” & Cultural Immersion

The atrium lobby of the Urabandai Lake Resort is a viral sensation for fans of Demon Slayer. With its multi-level wooden corridors and a floating stage over a water feature, it creates a hauntingly beautiful atmosphere.
Don’t Miss: The live Shamisen (Japanese banjo) performance daily from 4:00 PM to 6:00 PM on the floating stage. It is an enchanting experience that transports you to a fantasy realm of old Japan.

Scenic Spots: Ice Fishing and Ghostly Cliffs

• Lake Hibara Ice Fishing: In winter (Jan-Mar), the lake freezes over. You can rent a heated “fishing dome boat” directly through the hotel and catch Wakasagi (smelt) to be fried as tempura immediately after.
• To-no-Hetsuri Crags: A 40-minute drive away, these ancient cliffs overlook the emerald river and offer a “bird’s eye” view of Fukushima’s vertical geography.[17, 10]
• Urabandai 3D World: A nearby museum explaining the 1888 eruption through immersive displays—ideal for families.

Local Gastronomy: Smelt & Mountain Salt

Wakasagi Tempura: The small silver fish caught in Lake Hibara are incredibly crisp and sweet. They are best enjoyed with Aizu Yamashio (Mountain Salt).
Yamashio Ramen: A specialty of the neighboring valley, using salt extracted from ancient fossil seawater trapped in the mountains. The broth is clear, sophisticated, and deeply savory.[18, 19]
Vegan & Vegetarian Adaptations:
Vegetarians should try the local Soba (buckwheat noodles). In the Urabandai area, Kyukamura offers extensive vegetable-based buffet options.[20] Pro Tip: Ask for “Sakana-dashi nuki” (No fish stock) and enjoy your noodles with Walnut Miso or simple salt to fully appreciate the “Aizu-no-Kaori” buckwheat aroma.

Cultural & Historical Context

The name “Nekoma” refers to the peak of Mt. Nekomagatake. According to folklore, a giant cat-demon once haunted these mountains, but it was later pacified by local spirits. Historically, this area was a vital military checkpoint between the Aizu and Yonezawa domains. Today, the “Demon” name lives on through the Nekoma Mountain Snow Resort, which is now one of the largest ski areas in Japan following its 2023 merger.[21, 16]

Practical Travel Tips

• Tattoo Policy: Urabandai Lake Resort offers private rental baths (approx. 3,240 yen for 45 min), which are the standard solution for guests with tattoos. Small tattoos covered by stickers are generally tolerated in communal areas.
• Connectivity: Wi-Fi is strong throughout the resorts, and the observation lounges are perfect for remote work with a view of the lake.
• Access: Use the Free Shuttle Bus from Inawashiro Station. Reservations are required for groups of 10 or more, but individual travelers can usually board freely.[7]

2025-2026 Latest Updates

For the 2026 season, the resort is launching “Luxury Starlight Canoeing,” allowing guests to paddle onto Lake Hibara at night to view the Milky Way, followed by a thermal soak. This is part of Fukushima’s new “Astro-Tourism” initiative aimed at Western markets.[12, 7]

Safety & Manners

Iron Staining: Because the water is iron-rich, it can stain light-colored swimwear or hair; it is recommended to keep your hair out of the water.
Winter Hazards: During blizzards, “whiteout” conditions are common around Lake Hibara. If driving, keep your headlights on even in the afternoon to remain visible. Finally, always follow the Shamisen Etiquette—refrain from loud conversation during the lobby performance.