BEWARE:
IF You pay your spa/onsen bill with a credit card they will AUTOMATICALLY calculate the bill in your home currency "for your ease" and THEIR benefit-- the exchange rate they give you is MUCH LOWER than my credit card company was providing me. TELL THEM "NO"-- provide bill in YEN (then you get the exchange rate from your credit company-- much better deal for you, not for them)

As for the Onsen itself-- Fair to Average--PRICEY (I downgraded it to POOR due to the billing issue). (I guess they also have a Hotel attached to this property).
This review is for the ONSEN SPA.

I went to this "in town" Onsen (mineral bath spa house) after my "Cup Noodle" Museum visit — for this onsen, in the middle of a major city without natural access to a hot water spring— they truck in the water.

It was a good ONE-TIME experience— but as I’ve been to MANY spas in China, ALL that put this one to shame I wouldn't go back to this one…But go and be aware. I went solo and speak no Japanese...so was flying by the seat of my pants, except I wasn't wearing any pants in the spa.

So in essence you go into same-sex only areas: 1) clean/wash/shampoo yourself VERY WELL sitting on short stools in a little 1/2 sectioned off cubicle in a row of 15 other such cubicles…then and only then, you have the option of dipping in the indoor pool 1.5 ft. deep, or the outside shallow pool/in a natural setting, or outside in a cedar tub in same natural setting overlooking the bay-- very nice of a sort….all on the 7th floor of this building. I didn't go to the top floor--where I hear you can view the huge ferris wheel and soak your feet in hot water (that area is co-ed so everyone is wearing their spa clothes)

If too hot—options: sit 1/2 out of water, get out of hot water, or go to the COLD water plunge. In addition, there are dry sauna, steam sauna, steam herbal sauna, and full-body scrubbing room done by little Asian women.

Then the next option is to put on a spa-provided outfit and wander bare foot into a restaurant area…there is a one with menus (photos, no English) and a buffet with food sold by weight (nothing marked in English, no instructions that is the way it is sold—) all a crap shoot…my six item 28usd meal with one beer, had only two items I should have bought—I am learning!

Supposedly there is a room where you can lounge in huge lounge chair and watch your own individual TV— never found it.

By the end of two hours I was cooked “well done”. And knew the bus I needed (comes only once an hour) was soon arriving…so I checked out— two hours, several very nice relaxing soaks (2500yen for entry), two great dim sum shumai (didn’t like the other items), and a nice very cold glass of Kirin beer—the whole learning experience a pricey 55usd (65% of that was the food and drink).

Interesting concept of a huge spa complex offering various sorts of entertainment after hot spring bath in the middle of the city. Due to the large number of visitors and the limit on how much natural hot spring they can truck back into the city from the countryside, the bath itself way too much chlorine added in for hygienic reasons. The food at the restaurant was overpriced as well, for a place that already charges you for admission.

Clean, great food, lovely views, rooms are very comfortable. Have been here many times and have never been disappointed. If u want the good food more the menu, order early as it often sells out early in the evening.