Ikaho
伊香保Ikaho is an onsen town built on a staircase. Its 365 stone steps, climbing steeply up the flanks of Mount Haruna, form the central axis around which everything else arranges itself: ryokans on either side, souvenir shops in the lower reaches, small shrines and viewpoints at intervals, and at the summit, the Ikaho Shrine and the source spring that has sustained the town since the seventh century. Walking these steps is not merely transit; it is the experience itself, a physical engagement with the town's vertical geography that makes the bath at the end feel thoroughly earned.
Ikaho's waters come in two varieties. The original kogane no yu, or golden water, is rich in iron and calcium, its distinctive amber color the result of iron oxidizing on contact with air. This water has been drawn from the mountain since the Nara period and is credited with benefits for poor circulation, muscle pain, and, in local tradition, fertility. The newer shirogane no yu, a clear, calcium-rich spring discovered in more recent decades, offers a lighter bathing experience. Together, the two springs give Ikaho a duality that invites return visits and comparison.
The town's atmosphere is consciously retro, its narrow alleys and wooden facades recalling the Showa and Taisho eras with an authenticity that planned nostalgia cannot achieve. The collection of vintage amusement arcades along the stone steps, where mechanical games from the 1960s and 1970s still operate, adds a whimsical note that distinguishes Ikaho from more solemn onsen destinations.
Ikaho is an onsen town built on a staircase.
Highlights
The 365 stone steps are the spine of the experience, and the ascent rewards slowness. The lower sections pass through the town's commercial zone, where shops sell the local specialties: brown sugar manju steamed over the hot spring, Ikaho senbei rice crackers, and trinkets that lean into the retro aesthetic. As you climb, the density thins, the sounds of the town fade, and the steps acquire a more meditative quality. Near the top, the Ikaho Shrine marks the spiritual summit, and just beyond it, the Dome of Source Spring allows visitors to view the kogane no yu bubbling from the earth.
The Ikaho Green Bokujo, a highland ranch on the slopes of Mount Haruna, provides panoramic views of the Kanto plain and a pastoral experience that contrasts pleasantly with the onsen town's enclosure. On clear days, the view extends to the Tokyo skyline and beyond to the Pacific.
The retro game arcades are a genuine delight, their mechanical shooting galleries, pinball machines, and hand-cranked games preserved in operating condition. The Ikaho Toy, Doll, and Car Museum extends this nostalgic vein with collections that span the early Showa through the bubble era.
Culinary Scene
Mizusawa udon is Ikaho's culinary crown. Produced for over four hundred years at the cluster of udon restaurants near Mizusawa-dera temple, a short drive from the onsen town, these noodles are prized for their translucent appearance and springy, almost crystalline texture. The traditional serving is cold, with a choice of sesame or soy dipping sauce, though some shops offer hot preparations in winter. The water quality, drawn from the same mountain springs that feed the onsen, is credited with the noodles' distinctive character.
Brown sugar manju, steamed in bamboo baskets over the hot spring, are Ikaho's signature confection, their soft, sweet exterior giving way to a core of smooth koshian red bean paste. They are best eaten warm, purchased from the shops along the lower stone steps.
