Naruko Onsen Kanshichiyu

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

Kanshichiyu says it was founded in 1784, which makes it the oldest inn in Higashi-Naruko, and it still keeps a fukusa cloth it was given by the Date lords. The seventh-generation owner, who trained at Kyoto's Tawaraya, runs it as a tōji (bathing-cure) inn with about 30 tatami rooms in two Shōwa-era wings and a shared kitchen. The draw is the water. The large baths take Higashi-Naruko's shared Akayu supply, with about 10% water added to cool it. The small 'Furōsen' bath uses the inn's own Kanshichi spring, 100% free-flowing: tea- to cola-dark, full of black yunohana and smelling faintly of oil. When no one is in it, you can take it privately for free. Japanese guests rate it 3.9 across 315 reviews on one major site (baths 4.2, service 4.3) and 3.63 across 345 on another. Nearly every review mentions the owner: station pick-ups, lifts to restaurants and the convenience store, chatty welcomes. Bloggers who stayed in 2022, 2023, 2024 and 2025 loved the springs and the prices but described rubbish bags and junk in the corridors and kitchen, torn shoji, dusty changing rooms, a rain-stained room, and a 2023 check-in where they waited an hour for the owner. Reviews from 2025–2026 repeat the pattern: cleanliness scores of 3.3 and 3.23, one tub sometimes left empty, lukewarm water in winter, tobacco smells, stink bugs. Dinners served in your room are simple. Rates run about ¥9,900–11,550 per person with two meals, or from ¥4,400 self-catering.