Best ryokan in Shima Onsen: 5 inns compared on onsen, food and price

Shima Onsen Toshimaya is the surest way to have spring water to yourself: eight of its 15 rooms have their own bath, all on the inn's own spring with no water added, no heating and no recirculation. The river-view rooms Kikyō, Tsuwabuki and Tsubaki (10 tatami, third and fourth floors), Fukujusō (12.5 tatami, ground floor) and the special room Hagi, with tatami-base twin beds, have an open-air bath facing the river; an August 2024 guest called the bath 'the best', and a February 2026 reviewer had booked a similar room five times in over ten years. Mansaku and Rindō, on the ground floor next to the shared baths, have a compact ceramic tub on a wooden terrace. Shima Onsen Kashiwaya Ryokan has only two rooms with a bath, Hana and Kame (about ¥34,000 per person for two), and a November 2024 couple found Hana's bath visible from the road — but its three private open-air baths are free, need no booking and can be used as often as you like from 15:00 to 1:00 and 5:00 to 11:00, and with only 14 rooms most guests manage all three.

Shima Yamaguchikan's five special rooms with a free-flowing onsen bath — the 105.5㎡ river-side Mebuki and Soyokaze with semi-open-air hinoki baths, mountain-side Kusabue and the top-floor twins Kunpū and Kinmokusei, renovated in May 2023 — win the inn's warmest reviews and come with semi-private dining; a September 2026 couple paying over ¥30,000 per person called it the best inn of all their trips. Shima Tamura has three Kiyūkan corner rooms with a 100% free-flowing hinoki bath above the Shinyu river, and Suiyūkan's 15-mat rooms have a free-flowing hinoki bath too, though a June 2026 guest found the tub empty on arrival and too hot once filled; avoid 'room left to the inn' plans, which in 2026 put guests in rooms with no bath. Sekizenkan's Kashotei has suites and 'concept' rooms with their own open-air bath, but its rooms are being renovated from 15 September to late December 2026, so ask which are affected.

Shima Onsen Kashiwaya Ryokan scores 4.8 for dinner on one major site: a seasonal course of local produce in semi-private booths, built around Jōshū beef seared on a hot stone at your table, with rice cooked for each table and the okami's home-made sweet hanamame beans, the dish bloggers remember. At breakfast you choose a Japanese set with rice from an iron pot, a Western set with bread baked in-house, or a late café brunch in the village. The catch is uneven dishes — a fishy conger tempura in July 2026, and an August 2026 two-night stay on a beef plan that got no beef on the first night. Shima Tamura serves monthly kaiseki in private rooms at its Yamazakura restaurant or the semi-private Sekikei; a 2024 blogger with nearly 200 ryokan stays called it the most authentic they had had, and breakfast's rice porridge, cooked in the drinkable spring water, is what guests remember. Book a kaiseki plan at Tamura itself: the buffet plan at the sister Shima Grand Hotel was called 'like school lunch', and 2026 guests found the dining rooms very dark.

Shima Onsen Toshimaya's breakfast — sun-dried local rice cooked in a kama, a vegetable-heavy miso soup, home-made tofu and the inn's own salted iwana char — is one of the best-liked parts of a stay, and its 11-course satoyama kaiseki brings carp and venison sashimi and Jōshū barley pork; critics in 2024 and 2026 found it plain for ¥30,000 a person. Shima Yamaguchikan's Gunma kaiseki scores lower (dinner 4.1 on Jalan, meals 3.92 on Ikyu), with 2026 complaints about cold breakfast rice, 'shabby' sashimi and portions too large to finish, and the inn has suspended new allergy accommodation. At Sekizenkan it depends on your building: Honkan guests get a three-tier 'Sekizen bento' with free refills of Jōshū pork soup, good for the price, plus free late-night ramen since August 2026, while Kashotei and Sanso kaiseki was found cold and pre-plated in a detailed 2025 review.

Sekizenkan is the one people come to see: the inn says its Honkan dates from 1691 and is Japan's oldest surviving wooden onsen inn, and it is a prefectural Important Cultural Property; the 1936 Sanso, known for its latticed shoji, is a nationally registered cultural property, and Genroku-no-yu, a 1930 bathhall with arched windows and five sunken tubs where the water wells up from below, is what everyone raves about. Japanese bloggers keep reaching for Spirited Away when they describe it. Arrive in time for the 45-minute history tour at 16:00 on Tuesdays, Fridays and Sundays, which guests in all three buildings singled out from July to October 2026. Shima Tamura was founded in 1563 by a samurai retainer who became the area's bath-keeper under the Sanada lords; its thatched entrance and main house date from 1834, and guests have included the poet Yosano Akiko.

Shima Onsen Toshimaya has run as an onsen inn in Shima since the Edo period, according to the village's tourism portal. Shima Yamaguchikan claims more than 350 years of history but is today a big, eight-storey inn kept deliberately Shōwa-retro inside, and the okami's kamishibai picture-story show — running for 33 years by one 2026 account — is the other thing guests remember; it doesn't run when the okami is away. Shima Onsen Kashiwaya Ryokan is the newest-feeling: a small wooden inn fully renovated in 2021 in a nostalgic 'wa-modern' style, with black dial phones in the rooms, stained glass in the women's bath, a library with free house-roasted coffee and a soap-bubble send-off.

Shima Yamaguchikan is the easiest to reach: the Yamaguchi bus stop is at its door, buses to Nakanojō run roughly once an hour, the direct Shima Onsen-gō bus runs from Tokyo Station (reservation needed), and staff park your car in the free lot. The 12-tatami corner rooms have big windows over the river and suit families, there's wheelchair loan and an accessible toilet on the fourth floor, and 2026 guests who brought elderly parents chose a river-side special room for its few steps. Children still in nappies may not use the big baths, and the inn has suspended new allergy accommodation. Shima Onsen Toshimaya, a minute from the same stop, welcomes babies with baby-bath gear, baby plans with in-room meals and free baby food — but it has no lift, says it isn't suited to older guests or anyone with limited mobility, and 2026 families reported insects in rooms in summer.

Shima Tamura has three lifts and free parking for 120 cars but no shuttle from Nakanojō Station, and 2026 guests found its three wings maze-like and hard for older visitors. Shima Onsen Kashiwaya Ryokan welcomes children at set rates — from ¥2,000 sharing bedding without meals to ¥15,000 with a child's meal and futon — though some room types don't take children; there's no lift, the private baths are up more steps, parking is for about 15 cars and the village centre is a 20-minute walk. Sekizenkan's buildings are linked by stairs, long corridors and a tunnel that reviewers found confusing with bags, and one warned it would be difficult for elderly guests.

Sekizenkan's Honkan, the only value-tier stay of the five, is astonishing value: ¥9,900 per person with two meals on a December 2021 weekday, about ¥10,000–12,000 in 2023–2025, and ¥12,100 plus bath tax for the basic plan in January 2026, with Genroku-no-yu on the ground floor; it scores 4.57 across 52 reviews on one major site. The catch: shared toilets, no sink of your own, footsteps and voices through the floors and cold corridors in winter. Book direct and check the building — in August 2026 the inn warned that some overseas sites, including Agoda and Booking.com, pass Kashotei or Sanso bookings to it as Honkan stays, and Kashotei and the Sanso cost over ¥30,000 per person. Shima Yamaguchikan's standard two-meal plans cost about ¥15,000–27,000 per person in 2026, and it rates 4.3 across 2,282 reviews on Jalan, with baths at 4.8.

Shima Tamura's kaiseki plans start around ¥19,600 per person (4.4 across 2,047 reviews on one major site), and Shima Onsen Toshimaya's two-meal stays run about ¥19,000–30,000+ per person (4.5 across 759 reviews on one site). Shima Onsen Kashiwaya Ryokan is the priciest standard rate at about ¥21,000–34,000 per person for two, from ¥3,000 more on Saturdays, but it also scores highest, 4.7 across 1,256 reviews on one major site, and its private baths cost nothing.

Shima Onsen Toshimaya owns three springs; its main source rises on site at about 60°C and 200 litres a minute, and instead of adding cold water the inn cools it through a heat exchanger chilled with mountain water, then runs it through every tub with no heating or recirculation, draining them daily — it says it's the only inn in Shima where all baths work this way. Baths score 4.66 on one major site, where the inn rates 4.51 across 977 reviews, though the shared baths are small, with about three washing stations. Sekizenkan's spring is about 67°C at the source, close to neutral (pH 6.6) and drinkable, and one blogger reports it is used without recirculation, heating, chemicals or added water; baths score 4.71 on a major booking site. Shima Tamura's own sources rise from the riverbed at 70–80°C, about 1,600 L/min, and the inn describes all its baths as free-flowing without publishing details on heating or added water; they include the mixed Ryūgū bath dug into the riverbed, which closes when the river rises and allows no bathing wraps, and baths score 4.6–4.72 everywhere. Day bathing there has been suspended since June 2026.

Shima Yamaguchikan blends six sources; the inn and bloggers call it free-flowing, while Jalan lists it as free-flowing with water added, and its baths score 4.8 there. Its two long open-air baths sit right on the river, but they swap at set times: women get the 30-metre Odaimoku bath only from 12:00 to 19:00, men from 19:30 to 9:00. Shima Onsen Kashiwaya Ryokan draws from two of the village's sources; its own table lists only the barrel bath Tsuki-no-yu and the Hana and Kame room baths as fully free-flowing, with the other two private baths and both indoor baths free-flowing with recirculation, and up to about 4°C of heating and a little added water may be used.

For water with nothing added and a river-view bath in your room, Toshimaya, if stairs with no lift and a plain-for-the-price dinner won't bother you. For free private open-air baths you can use as often as you like, plus the best-rated dinner, Kashiwaya — accepting thin walls, steep stairs and a 20-minute walk to the village centre. For history at a bargain price, a Honkan room at Sekizenkan, staying the night for Genroku-no-yu without the day crowds; for private-room kaiseki and seven baths, including one in the riverbed, Tamura; and for long open-air baths on the river, a lively atmosphere and the easiest access, Yamaguchikan, though not for the food. Whichever you pick, check the exact room and building: in Shima, a bath of your own, a river view and even a toilet often come only with certain rooms, wings or plans.