Yumura Onsen Tomiya

Rooms with a source-fed open-air bath (源泉露天風呂付12畳/16畳和室), or the 66㎡ Japanese-Western Superior (源泉露天風呂付和洋室スーペリア) on the fifth floor

The Superior pairs a 10-tatami room with a twin bedroom and a ceramic outdoor tub. A September 2026 Ikyu guest in a 12-tatami open-air room found the tub bigger than the photos, with room for two to stretch out, and loved the water pouring in nonstop. An August 2026 guest in the 16-tatami room, on a third summer visit in a row, asked staff whether it was really fine to let so much run. A July 2023 blogger found the ceramic tub large, source-fed and hot enough that you add cold water, with a thermometer to help. Downsides: these tubs have no washing area, a July 2026 guest found the rest-area tatami worn and the decking loose underfoot, and an October 2025 guest in the Superior found stink bugs swarming the tub and the room. On Ikyu, the basic two-meal plan for two costs ¥46,600 (12 tatami), ¥52,000 (16 tatami) or ¥62,600 (Superior).

'Tsuki no Akari' (月のあかり), a 12-tatami room with a semi-double bed and what used to be a private open-air bath

A May 2024 blogger listed Tsuki no Akari as one of the inn's two private open-air baths, and Ikyu's listing says the private bath was designed by a well-known designer featured on the TV documentary Jōnetsu Tairiku. Rakuten now sells it as a guest room with that open-air bath. An October 2026 Jalan reviewer loved having a tub big enough for four or five adults all to themselves, whenever they liked. A July 2026 Rakuten guest found the tub very large but the changing room smelled. On Rakuten, the basic two-meal plan costs ¥21,300–25,300 per person for two.

Bath-less 'omakase' rooms (おまかせ和室, single or semi-double), the 9-tatami room, and anyone sensitive to smells

The omakase rooms sold on weekday business plans have a toilet but no bath or shower. Several 2026 solo guests were happy to use the large baths instead, and the food on that plan is just as generous. The 9-tatami room has no Wi-Fi and a toilet without a bidet seat, according to Rakuten. In the 10-tatami 'double', a May 2024 blogger found a semi-double bed made up with single-size bedding. 2026 reviews of standard rooms mention a musty smell in a mountain-side room (September), a broken air conditioner that was fixed quickly (October), cobwebs in a toilet (August), a room-bath tap slow to fill (July), and lights that can only be switched off from outside the room (September).