I Looked Into Ikoi Ryokan

On this blog, I've been continuing to research hot spring inns and day-trip bathing facilities that seem reachable without a car, almost like an ongoing series. I've been gradually covering the Kyushu area too.

This time, I looked into Ikoi Ryokan, located in Kurokawa Onsen in Kumamoto. What got me interested—even as someone who's more of an indoor type—was seeing that you can go on a bath-hopping tour with 13 different types of baths just within the property itself.

The Short Version

Apparently, this is the only inn in Kurokawa Onsen selected as one of Japan's "100 Famous and Hidden Hot Springs," and it offers a bath-hopping experience with 13 different types of baths right on the premises.
As for Rakuten Mobile signal conditions, the official tool couldn't produce a result, so the status came back as unknown.

I've summarized the details below.

What Kind of Place Is Ikoi Ryokan

Ikoi Ryokan appears to be an inn located along the Kawabata-dori street in Kurokawa Onsen, in Minamioguni Town, Aso District, Kumamoto Prefecture. According to the official website, it's the only inn in Kurokawa Onsen selected as one of Japan's "100 Famous and Hidden Hot Springs," and it's set up so that guests can enjoy 13 different types of baths just by wandering around the property itself.

It's described as an inn with a folk-craft, homey atmosphere—the kind of place where people naturally gather around the sunken hearth near the entrance. Check-in is said to run from 3:00 PM to 6:00 PM, and check-out is at 10:00 AM, though these times may vary depending on the plan. I couldn't find specific pricing for a one-night-with-two-meals stay on the official website, so it seems you need to check the accommodation plan pages directly. Reservations can apparently be made either through the plan pages on the official website or by phone.

Checking Out the 13 Baths and Sauna

Looking into the bath lineup, it left quite an impressive impression of abundance.

Outdoor baths: 2 for men, 2 for women (including a women's outdoor bath called "Bijin-yu" or Beauty Bath)
Indoor baths: 4 for women, 1 mixed-gender
Private baths: 4 mixed-gender
Sauna: 1 for men
Signature baths: the mixed-gender outdoor bath "Taki-no-yu" (Waterfall Bath), which is itself one of the selected 100 Hidden Hot Springs, and "So-no-yu"

The water quality is a simple hot spring containing salt, sulfur, and hydrogen sulfide, with a spring temperature of 68°C, delivered as a continuous flow (no recirculation). Listed benefits include help with wounds, rheumatism, neuralgia, muscle pain, and fatigue recovery. There's also a day-trip bathing option available even without staying overnight—drop-in bathing costs 800 yen for adults and 600 yen for children, while private baths run 1,500 yen for adults and 900 yen for children. Drop-in bathing hours are from 8:30 AM to 9:00 PM (last entry at 8:30 PM), and private baths are available from 10:00 AM to 3:00 PM (last entry at 2:30 PM).

Komorin

With 13 baths to hop between, I get the feeling one night might not be enough to try them all. Being able to use the private baths even as a day-tripper feels like a nice perk too.

Rakuten Mobile Signal Conditions

Since I use Rakuten Mobile myself, I was curious whether I'd get a signal at the inn's location. I tried checking the address for Ikoi Ryokan using the official My Area Connectivity Simulation tool, but instead of a result, I got a message saying something like "currently undergoing temporary maintenance."

It seems this kind of message can appear when there's no data prepared for a particular address, and in this case, the area assessment came back as "unknown." I couldn't confirm whether the signal is good or bad—it just wasn't determinable. Since Kurokawa Onsen is known as a hot spring area nestled in the mountains, if you're planning an actual visit, it might be a good idea to check the conditions yourself with your own device once you're there, just to be safe.

Komorin

Honestly, it was a bit disappointing not to get a clear result, but I didn't want to force it and just claim "it's probably fine," so I decided to be upfront and report it as unknown.

See Rakuten Mobile Details

Wrapping Up

Pulling it all together, my overall impression of Ikoi Ryokan is that it's the only inn in Kurokawa Onsen selected as one of Japan's 100 Famous and Hidden Hot Springs, offering a bath-hopping experience with 13 different types of baths right on the premises. Beyond just the outdoor and indoor baths, it also has private baths and even a sauna, and the fact that you can enjoy all of it as a day-trip visitor is an appealing point. As for Rakuten Mobile signal conditions, the official tool wasn't able to produce a result, so it remains unknown. If this matters to you, it's probably worth checking again yourself using the official Rakuten Mobile tool.

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