Onsen and baths in Shibukawa

A cheap, popular day-use bathhouse right by Onogami Onsen station with famously slippery alkaline sodium-chloride water, two indoor tubs, an outdoor bath, a dry sauna, and a private bath option, though the water is circulated and chlorinated rather than flowing straight from the source.

A large super-sento day-spa near the Shibukawa-Ikaho interchange with sky-view outdoor baths over mountain scenery, sauna, extensive rock-bath (ganbanyoku) relaxation area, and a popular morning-bath-plus-breakfast-buffet deal, though several reviewers flag chlorine smell in one indoor tub, coin lockers, and cash/PayPay-only payment.

A hillside day-use spa above Shibukawa with kakenagashi outdoor baths, a well-regarded sauna and cold plunge, a reservation-only private bath, and an extensive manga-and-lounge rest area, all with sweeping mountain and river views.

The day-use bathhouse of the Ikaho Grand Hotel, famous for Ikaho's iron-rich golden/brown spring, with well-stocked amenities, a sauna (but no cold plunge) and an unusually large manga/lounge rest area; despite marketing itself as kakenagashi, staff have confirmed chlorine is added, and hygiene complaints (loose hair in the changing room and bath) recur.

A small city-run day bath halfway up Ikaho Onsen's famous stone steps, with a single indoor tub, a step-viewing terrace instead of an outdoor bath, and no sauna; despite the historic Ikaho spring source, several reviewers detect added chlorine rather than a true kakenagashi feel, and the locker deposit is not refunded.

A small, well-loved neighborhood bathhouse near Kaneshima station with a genuine iron-rich, slightly-heated kakenagashi spring, one indoor and one outdoor tub, friendly resident cats, and a strict 2-hour, 500-yen entry.

A modern hotel-and-spa complex (Hanayu resort group, sister facility to Sky Terme) with sauna, cold bath, kakenagashi-advertised simple spring, and a paid rock-bath/temperature-therapy course, but with recurring complaints about restaurant reliability and one report of a loose, mildly dangerous rock seam in the bathing area.

A sake-shop-run RV/campervan overnight park near Ikaho Onsen rather than a bathhouse itself; guests walk to the neighboring Hibikino hotel to bathe, at a price some reviewers find steep with no RV Park discount.

Not a bathhouse but a coin-operated roadside stand where locals fill tanks with genuine hot spring water to take home (historically 200 liters for 100 yen); reviews from 2024-2025 report it has been broken and out of service for an extended period.

Baths that admit you without an overnight stay

Rotenburo, confirmed by visitors

Gensen kakenagashi, not recirculated

Often with a cold plunge