Yu-Topia Mido Mospa

Sodium-sulfate natural spring per one reviewer; another records source temperature about 37 degrees C, pH 8.3, with heating and dilution. Three reviews describe slightly viscous/slippery water (torotoro/nurunuru; one calls it weakly alkaline). Quality is disputed: three reviews find the water characterless or indistinguishable between the named tubs. A summer event (21 Jul - 31 Aug per one reviewer) sets the seasonal and open-air tubs to about 36 degrees C lukewarm.

Sauna with auto-loyly - claimed as the area's first by one reviewer - confirmed by at least three reviews; one details capacity ~10, 96-98 degrees C, 12-minute clock, no TV, music playing. The cold bath is small but properly cold at 16 degrees C (one reviewer; two others confirm a cold bath exists). Weekend sauna queues reported by one reviewer, and two reviews complain sweat-soaked sauna mats are changed too rarely. There is a semi-open rock-style rotenburo (three reviews) plus indoor variety tubs: main bath, seasonal bath (hinoki at times), 'bihada' bath, carbonated bath. A free outdoor foot bath operates during business hours (three reviews).

The main baths are NOT kakenagashi: at least four reviews state the tubs are recirculated/blended, one specifying all tubs are diluted, heated, recirculated, and disinfected ('like plain heated water'), and two disappointed visitors calling it circulation-style. Two reviews report clear chlorine smell (one especially in the rotenburo), while one reviewer found the smell milder than reviews suggested. Exception per one review: the kakeyu (rinsing station) of the main bath and the paid private bath are kakenagashi.

Hair dryers are free (one review); sinks have tissues and cotton swabs but no hairbrush per another. No coins are needed for shoe or clothing lockers. Washing stations are fully partitioned with strong showers (one review; another praises a 3-mode large shower head), but two reviews complain there are too few washing stations and one counts only 10 belongings shelves.

Staffed municipal facility: one reviewer counted about four reception staff giving careful explanations, another says reception now has 2-3 people after opening-day understaffing; two reviews praise friendly staff. Early-days operational problems appear in two reviews (staff unused to customers causing trouble at opening; one visitor handed the wrong locker key). Exit checkout is by machine, purchases at the counter.

One Jun 2026 reviewer states last admission is 20:00; entry is sold in 3-hour blocks (multiple reviews reference the 3-hour limit). Opening date is disputed between two reviews: one says it opened 24 April, another celebrates a 24 May 2026 opening (1 vs 1 - possibly soft vs official opening).