Best ryokan in Kusatsu Onsen: 8 inns compared on onsen, food and price

Naraya, beside the Yubatake since 1877, is the purist's choice. Its Shirahata spring, about pH 1.2, is cooled without adding water: rested overnight, then stirred by hand to soften its bite. It scores 4.63 across 186 reviews, 4.67 across 928 and 4.8 across 1,690 on three sites, with the baths highest (4.79). The catch: sound travels through the building, there are stairs everywhere, and only one room has its own onsen bath.

Kusatsu Onsen Boun, on the hill just above the Yubatake and dating to 1598, runs two springs — Bandai (about pH 1.6) and Sainokawara (about pH 2.0) — through six tubs in three bath halls, free-flowing with a little water added to cool them and never recirculated. It scores 4.8 across 2,623 reviews on Jalan, 4.68 across 1,360 on Rakuten Travel and 4.65 across 211 on Ikyu, with the baths highest. Recent guests report uneven service and dinners they rate below the baths, and the steep slope up from the Yubatake is hard on bad legs.

Nushiyu Ryokan, a 14-room family-run house about 15 seconds from the Yubatake, also draws the Shirahata spring — pumped up, but not recirculated, heated or diluted — and advertises Kusatsu's only open-air bath looking down on the hot-spring field. The view is mostly from the men's side, though: the inn says it is hard to see from the women's open-air bath, and trees block it unless you stand.

Kusatsu Onsen Boun's new main wing, opened in January 2025, is the place for free-flowing onsen in your own room: every room there has one. A blogger paid ¥26,400–28,600 per person with two meals in August 2024, and an Ikyu guest paid ¥60,000 for two in 2025. Voices can carry between the semi-open-air baths of the Unshōan rooms.

Yuyado Toki no Niwa gives all 64 rooms an open-air onsen bath on the balcony, and shares two bath halls and three free private baths — 23 tubs in all — with its sister inn. It scores 4.5 across 3,472 reviews on Jalan and 4.42 across 1,815 on Rakuten Travel, but only 3.92 across 90 on Ikyu. The room baths are not free-flowing: according to the inn's FAQ you fill them with a switch each time. Two-meal rates for two start around ¥66,000–71,000, it is a 15–20-minute walk from the Yubatake, and 2025–2026 guests report worn tatami, musty smells and thin walls.

Elsewhere, private onsen is scarce: Naraya has a single room with its own onsen bath (Iwakagami), and the 12 rooms with open-air baths at Hotel Sakurai use heated ordinary water, not onsen.

Kusatsu Onsen Kanemidori, founded in 1902 as a restaurant, is the inn people choose for dinner: a seasonal kaiseki of about nine courses, with a miso-style Jōshū beef sukiyaki as the signature. It scores 4.7 across 1,059 reviews on one major site, with dinner and service both at 4.8, and 4.51 across 863 on another, at about ¥23,000–30,000 per person with two meals. Both its springs are free-flowing. The catch: the inn's own FAQ warns the rooms have no views, its two private baths cost ¥3,300 for 45 minutes and can only be booked on arrival, and many guests can't finish the portions.

Naraya pairs its water with a sushi chef making nigiri at your table, and its head chef won a national Japanese-cuisine prize in March 2026; in summer 2026, though, several guests said dinner took two and a half hours. Kusatsu Onsen Hotel Ichii is the buffet pick: a live kitchen with Jōshū beef steak and made-to-order sushi, with dinner rated 4.8 within a 4.7 score across 4,424 reviews on one major site — but dinner is limited to 90 minutes.

Kusatsu Onsen Daitokan, a 95-room Meiji-era inn facing the Yubatake, is the budget option: two-meal buffet stays usually cost about ¥9,000–16,000 per person. It pipes the Yubatake spring itself into its baths, serves an 80-dish Gunma buffet with tempura fried on the spot, and includes free use of the baths at two sister hotels. It scores 3.86 across 2,907 reviews on one major site, with rooms at 3.51. The building is tired, every room permits smoking, 'Yubatake-side' rooms don't guarantee a view, and the two shared baths are small and crowded.

Nushiyu Ryokan costs about ¥14,000–17,000 per person for two sharing on most dates (up to about ¥26,000 at peak) and scores 4.40 across 571 reviews on one major site, with dinner at 4.56; there's a free private bath you use whenever it's empty. Payment is cash only, rooms are sold as smoking rooms, there's no air conditioning, the five floors have no lift, and 2025–2026 guests mention worn bathrooms and sound carrying.

Kusatsu Onsen Hotel Sakurai, the town's biggest hotel with 179 rooms but run like a large ryokan, suits families: a bath about 30 metres long and a rock open-air bath fed by three free-flowing springs, a nightly yumomi water-paddling show guests can join, roomy tatami suites in the 16-storey new wing, and kids' chairs and baby soap in the bathhouse. It scores 4.6 across 6,576 reviews on one major site, and buffet plans typically cost about ¥21,000–30,000 or more per person. It is big and busy, the first buffet run gets crowded, the hotel shows its age, and its Wata-no-yu spring was suspended from 14 September to late October 2026 for pump maintenance.

Kusatsu Onsen Hotel Ichii stands directly across the street from the Yubatake, with two free-flowing springs, an indoor bath of three tubs at different temperatures and that buffet. It scores 4.63 across 3,276 reviews on a second site, and most 2026 reviewers on one site paid ¥19,000–26,000 per person. Only 23 rooms actually face the Yubatake, most rooms are dated, the walk from the main building to the baths takes 3–4 minutes with two lifts, and there are no private baths.

For Kusatsu's water at its most traditional, Naraya or Boun; for a free-flowing onsen in your own room, a room in Boun's new wing. Come for dinner and pick Kanemidori. On a budget, Daitokan or Nushiyu Ryokan, both steps from the Yubatake, if you can live with an old, smoking-permitted building. Families do best at Hotel Sakurai, and Hotel Ichii if a Yubatake-view room matters. Toki no Niwa suits anyone who wants a bath on the balcony and doesn't mind that it's filled on demand rather than free-flowing. Whatever you book, check whether your room's bath is onsen at all.