2 onsen options - public indoor & private 露天風呂(outdoor rotenburo). I spent ~2h over multiple visits in the onsens (1 night stay) Water temperature (42 Celsius) was perfect, and left skin feeling great Friendly and polite staff Operates like a historic ryokan (i.e. call reminders for meals, setting up futon, etc) Quiet & good room size. Note: Yes, there's water damage/mildew, but it is an older ryokan. Decent for the price and authentic experience

Location - car recommended. Bus is OK, but only walk friendly attraction is the ryugaeki falls. Access to Shiraito falls is cut off (Shinanoji trail damaged) Meals were a mix of western and Japanese (which felt weird). For example pesto sea bream.

Very remote onsen in a national park away from the busy city so noise pollution was non existent. There was a stream running from outside our room so which was very relaxing if you enjoy those sounds. The private onsen which you could book when you want to use it was clean and extremely relaxing. The water temperature was excellent. The staff were excellent and very accommodating as we did not speak any English at all so had to communicate via google translate.

Really only accessible by car as public transport was limited during the night. We did see a bus stop just outside Kose. The mountain roads leading up to the hotel are pitch black at night so be prepared and drive carefully. It is a tolled road into a national park so during the day you have to pay 500 yen but during the night the toll was unmanned. The hotel staff did say after we arrived that had we mentioned Kose hotel we would have been let in for free, if you had payed the hotel would refund you if you keep your receipts

Staff very friendly and helpful. Staff speak little english, so be prepared to use a translator. Onsen water is very good. Food is very nice, standard kaiseki meal. Breakfast is typical japanese breakfast. Private onsen is free of charge. Hotel easily accessible via bus. Check the schedule before time since the bus isnt 24 hours.

Staff was very kind and patient since I do not understand Japanese too well. The food was great

There is not much more to see nearby than the hotel itself and you would need a car or rely on an infrequent bus connection (with most passenger going to Kusatsu, so ensure to tell the driver you need to unboard earlier or it will take forever to get your luggage back)

It was a great experience but I expected more from the breakfast, although it was also good. The room was clean, the onsen was really nice. Very easy to get to the city with a bus.

The hotel is located in a quiet area, very peaceful. The private onsen rooms are so impressive, must try. The staff is very nice and helpful. I don't mind coming back if I have a chance.

None

Very good private onsen's and amazing food. nice and secluded

It was all good

Very traditional & small hot spring hotel in the mountain with nice view.

The hot spring bathroom is quite small.

Surrounding was very quiet and serene. Not crowded

It was a bit cold in the common areas as the weather was getting cold.

The location, the calm and the establishment.

Well, everything was great, but the bathroom is really really cold 😅