I Looked Into Ryokan Shimizuya
2026-08-29

Not just campgrounds - day-trip hot springs and inns are also things I keep digging into as side topics on Komorin's Imaginary Travels. This time, I put together another one of these as part of that ongoing series.
This time I looked into Ryokan Shimizuya, located in Nasu-Yumoto. Since Nasu is an area with a lot of campgrounds, I figured some people might drop by a hot spring inn in between camping trips - a kind of hotel-plus-vacation combo - so I got curious and decided to dig into it.
My impression was that of a calm, quiet inn centered on in-room dining, where you can enjoy the free-flowing hot spring water sourced from Shika-no-yu, said to be the birthplace of Nasu's hot springs.
As for the Rakuten Mobile signal, when I checked, no result came up at all, so it remains unclear - I'll be upfront about that.
I've put together the details below.
I Looked Into What Kind of Inn Shimizuya Is
Ryokan Shimizuya is apparently located in the Nasu-Yumoto area of Nasu Town, Tochigi Prefecture. According to the official website, it uses the free-flowing spring water straight from Shika-no-yu, said to be the birthplace of Nasu's hot springs, and the water quality is described as an acidic, sulfur-containing hot spring. It's a cloudy white water with a sulfur scent - the kind of hot spring that really feels like Nasu.
It looks like both the indoor and outdoor baths are separated by gender, but I couldn't find any mention on the official site of whether a private bath is available. Since the water is strongly acidic, there's guidance recommending pouring the water over your head or soaking only up to your waist, along with a note suggesting you keep each soak to around two or three minutes, taking breaks, for a total of about fifteen minutes. It seems like this is the kind of hot spring where you shouldn't linger too long.
The rooms apparently consist of eleven Japanese-style rooms and one combined Japanese-Western style room, each equipped with a TV, fridge, and a washlet toilet. Amenities also seemed to be fully stocked, including toothbrushes, towels, yukata robes, and shampoo, so it seems like you wouldn't have much trouble traveling light. That said, I couldn't find any mention of the room sizes, so that part remains unconfirmed.
Checking Out the Meals, Facilities, and Other Points of Interest
Both breakfast and dinner are apparently served in a kaiseki-style course, in your own room. Some dinner plans seem to include meat dishes like steak, and on Jalan I even spotted a plan featuring A5-grade Nasu beef steak. That said, no price list itself appears in the body of the official website, so it looks like you'd need to check specific prices through an external booking site.
The inn apparently has a lobby, front desk, banquet hall, a game corner, and a parking lot. On the other hand, there's no clear mention of whether things like Wi-Fi, a ping-pong table, a gift shop, or an elevator are available, so I couldn't confirm those. The top page did mention having "a relaxing corner and souvenirs available," so there might be some kind of small rest area or shop.
Reservations seem to be mainly by phone, with reception hours from 8 AM to 9 PM. It was a bit surprising to see it explicitly stated that they don't accept reservations by email. You can also apparently book through external reservation systems, Rakuten Travel, or Jalan, and there was guidance saying that if you want to use the national travel subsidy program, you need to book through one of these external sites for it to apply. If you're planning to use a travel subsidy, it might be worth checking this point ahead of time.
As for check-in and check-out times, as well as the fees and hours for day-trip bathing, some information does turn up in search results, but I couldn't find it stated in the body of the official website, so it's hard to say I confirmed it clearly. If you're considering a day-trip bath, it seems safer to call and check before you go.

In-room dining plus free-flowing hot spring water is a pretty appealing combo for someone like me who's more of an indoor type. That said, the unclear pricing makes me think you'd want to check an external site beforehand, or you might get a surprise on the day.
Rakuten Mobile Signal Conditions
I use Rakuten Mobile myself, so signal conditions at travel destinations are always something I'm curious about. I checked using the official "My Area Network Simulation" tool, entering the location of this inn (the Yumoto area of Nasu Town).
As it turned out, no coverage judgment appeared at all - instead, I just got a fallback message saying something like "currently undergoing temporary maintenance." This seems to be what happens when the tool doesn't yet have address data for the location in question, so I'm treating the overall result as "unclear" this time. I can't say it's good or bad - simply that I wasn't able to confirm it, and that's the honest result.
Given that it's a hot spring area nestled in the mountains, this might be the kind of place where signal conditions vary quite a bit depending on the exact spot. To put it plainly without exaggerating, this research alone just wasn't enough to say anything definitive.

Not getting any result at all wasn't something I expected. This is exactly the kind of situation where it's worth checking for yourself before you go.
The Surrounding Walking Routes Caught My Interest Too
Within walking distance of Shimizuya's entrance, there seem to be some walking routes typical of Nasu-Yumoto, including a foot bath called Shika-no-Ashiyu, Onsen Shrine, and the Sessho-seki rock. The foot bath is apparently free and open from 9 AM to 6 PM, close enough that you could stop by while strolling through the hot spring town. Sessho-seki is a historic site tied to the legend of a nine-tailed fox turned to stone, and there are said to be rows of small Jizo statues, called Sentai Jizo, along the walking path.
If you have a car, it looks like you could also reach places like Nasu Highland Park, Minamigaoka Farm, or Nasu Garden Outlet in about 10 to 30 minutes. I'm not really a driver myself, so if I actually went, it would probably mean a combination of train, bus, or taxi - according to the official site, the route would be taking the Tohoku Shinkansen to Nasu-Shiobara Station, then about a 50-minute taxi ride from there. There's also apparently a paid shuttle bus service for guests, which you can use by contacting the inn in advance.
Wrapping Up
To sum it up again, my overall impression of Ryokan Shimizuya was a calm, quiet inn centered on in-room dining, where you can enjoy the free-flowing spring water from the birthplace of Nasu's hot springs. The room amenities seemed fully stocked, giving off a vibe that you could stay there without packing much, but there were quite a few things - like the price list, check-in/check-out times, and details on day-trip bathing - that I couldn't confirm from the body of the official website alone, so it seems worth checking by phone or through a booking site before making a reservation.
As for the Rakuten Mobile signal conditions, even the official tool didn't display a result, leaving it unclear. If you're planning a trip to the Nasu-Yumoto area and signal is a concern, it might be worth checking the official tool yourself ahead of time for peace of mind.
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