Nestled on the slopes of Mount Haruna in central Gunma, Ikaho Onsen (伊香保温泉) is one of Japan’s classic hot spring towns famous for its unique golden-colored water, nostalgic atmosphere, and iconic stone staircase lined with traditional inns and old-fashioned shops.
Less commercial than Kusatsu and quieter than Hakone, Ikaho offers a slower, more local onsen experience that’s been drawing bathers and poets for centuries.
The Golden Waters of Ikaho
Ikaho Onsen is best known for its “kogane no yu” (黄金の湯) – iron-rich spring water that turns a deep, amber-brown color when exposed to air. It’s slightly cloudy, mildly acidic, and known to help with fatigue, circulation, and muscle pain.
There’s also a “shirogane no yu” (白銀の湯) or “silver water,” which is colorless and comes from a separate spring source. Some ryokan offer both types, letting visitors compare the feel and health effects.
Most ryokan have their own onsen baths, but the town also has public bathhouses like Ikaho Rotenburo (伊香保露天風呂). A simple, outdoor public bath using the golden water, tucked into the forest above town.
The Famous Stone Steps
At the heart of the onsen town is a long, sloped staircase called the Ishidan (石段), a 365-step stone stairway that stretches through the center of Ikaho. Lined with historic ryokan, sweet shops, footbaths, game arcades, and old cafés, it’s the perfect place for an evening stroll in yukata and geta sandals.
The Ishidan is more than just scenery, it’s the soul of the town. As you climb, you’ll pass stone lanterns, shrines, and the sound of flowing spring water running beside the steps.
At the top of the stairs is Ikaho Shrine (伊香保神社), small but spiritual, offering good luck for love and healing.
Staying in Ikaho
Many of Ikaho’s ryokan are family-run, some dating back generations. Most include kaiseki dinners, mountain views, and private or shared indoor/outdoor onsen baths.
Some notable places include:
- Hotel Kogure (ホテル木暮) – One of the largest, with multiple baths using golden water
- Yokotei (横手館) – A nostalgic, Taisho-era style wooden inn that feels like stepping into the past
- Fukuichi (福一旅館) – Mid-range, modern-traditional fusion, very central location
Even if you visit for just a day, you can enjoy the town’s public footbaths (ashiyu) scattered along the Ishidan.
Cultural Sites and Local Flavor
Ikaho isn’t just about bathing, it’s also a place of literature and art. The area inspired many Japanese poets and writers, and nearby you’ll find:
- Tokutomi Roka Memorial Museum – Dedicated to the Meiji-era writer who stayed and wrote here
- Ikaho Green Bokujo – A family-friendly farm attraction with animals and fresh dairy treats
- Takehisa Yumeji Ikaho Memorial Museum – Featuring romantic-style art and Taisho nostalgia
Don’t leave without trying:
- Mizusawa udon (水沢うどん) – A chewy, handmade noodle dish unique to the region
- Onsen manju (温泉饅頭) – Steamed buns filled with red bean paste, said to have originated in Ikaho
A Town for All Seasons
- Spring – Cherry blossoms around Lake Haruna
- Summer – Lush green mountain trails and firefly viewing
- Autumn – The hills surrounding Ikaho blaze with red and gold
- Winter – Quiet snowfalls and outdoor baths with steam rising into the cold air
Ikaho is especially beautiful in autumn, when the town feels wrapped in color and the steps become a natural viewing point for the changing leaves.
