Ryokan Ohashi

Misasa Onsen Kiya Ryokan

三朝温泉 木屋旅館

A 14-room wooden inn listed as a cultural property, with its own very hot radium springs — a free private bath where the water bubbles up through the floor, a radon steam room and a warm-floor rest room — but expect stairs, stink bugs and simple, home-style food

• Ryokan históricos
• Habitaciones con onsen privado

Misasa Onsen Misasakan

三朝温泉 三朝館

Misasa's big, busy all-rounder: three private radon springs, twelve baths around a 1,000-tsubo garden and a crab-heavy table — just reopened after a 2026 refresh, but most rooms are standard Showa-era tatami rooms without spring water

Misasa Onsen Izanro Iwasaki

三朝温泉 依山楼 岩崎

Misasa's century-old grand inn, host to emperors and writers: a 12-bath garden onsen with free-flowing cave and rock tubs and private-room kaiseki — but it's a big 74-room concrete house with fixed air conditioning, thinning service and towels you carry to the bath yourself

• Ryokan históricos

Naruko Onsen Kanshichiyu

鳴子温泉郷 勘七湯

Higashi-Naruko's oldest inn (founded 1784): two free-flowing springs, including its own dark, oily-scented 'Furōsen' bath you can take privately for free, at self-catering prices — but the Shōwa-era building is cluttered and run largely by the owner alone

• Habitaciones con onsen privado
• Ryokan históricos

Ryokan Ohnuma

旅館大沼

Eight free-flowing baths of two baking-soda springs, four of them free private baths you just lock, a hillside garden bath and famous house natto — a modern tōji inn at old-fashioned prices, with stairs and shared toilets

• Ryokan históricos

Nasu Onsen Sanraku

那須温泉 山楽

A 1923 inn whose own spring is piped 5.4 km from beside the Imperial Villa's source and never heated or recirculated, with a forest-ringed open-air bath of about 30 tatami and well-loved kaiseki — but 2026 reviews flag scalding in-room tubs, ageing fittings, empty lounge bottles and thin staffing

• Ryokan históricos
• Habitaciones con onsen privado