Kokoronisaku Hana Kokuya is a ryokan in Ikaho Onsen, Gunma, that presents itself as an established inn of about 100 years, with modern rooms and colorful yukata for guests to borrow. The inn says it is one of the few in Ikaho that draws its water directly from the source. Before you book, three things matter: dinner is only possible if you check in by 18:00; only six of the ten open-air room baths hold hot-spring water; and the kitchen offers no full allergy support.
Kokoronisaku Hana Kokuya, Ikaho Onsen, at a glance
| Item | Official information |
|---|---|
| Address | 52 Ikaho, Ikaho-machi, Shibukawa, Gunma 377-0102 |
| Phone | +81-279-72-3322 (front desk calls 10:15–19:00 Japan time) |
| Check-in / out | 15:00–20:30 / 10:00 |
| Dinner | Check in by 18:00; last dinner start 19:00 |
| Hot spring | Kogane-no-yu (“golden water”), brown, from the source |
| Meals | Dinner and breakfast in the dining area, not in your room |
| Smoking | All rooms non-smoking; smoking only at the lobby corner |
| Pets | Not allowed |
| Wi-Fi | In all rooms |
From the official site, read October 20, 2026.
The inn puts women travelers at the center: hand-made decorations and hanging ornaments fill the halls, and a rack of colorful yukata can be rented for 1,100 yen each (tax included), to wear while you stroll the stone steps of Ikaho.
Which rooms at Kokuya have a hot-spring bath?
This is the question to settle before you pick a room, because the inn’s open-air room baths are not all the same water. The FAQ lists them by name:
| Room bath water | Rooms (official names) |
|---|---|
| Hot spring (Kogane-no-yu, from the source) | Ha no Shizuku, Ki no Shizuku, Hana no Shizuku, No no Shizuku, Momiji (10 mats), Keyaki (12.5 mats) |
| Plain heated water, not hot spring | Otowa (semi-open-air bath, 12 mats) and the three Nishi-no-Miyabitei rooms KAI, KANADE and HIBIKI |
From the official room page and FAQ, read October 20, 2026.
What other room types are there?
The room page also lists Japanese-modern rooms with twin beds and a tatami area (Shinowa, Ubudo and Hinata), a single “Akari” room, one room with a tea room (booked as a Miyabitei Japanese room; you cannot pick it), and Japanese-Western rooms renewed in November 2023. Room sizes in square meters and the number of guests per room are not on the pages we could read.
The baths at Kokuya
When can I use the shared open-air bath?
The view open-air bath is one bath shared by turns: men from 5:00 to 10:00 and 15:00 to 19:30, and women from 20:00 to 1:00. There is also a large indoor bath. The water is the brown Kogane-no-yu that Ikaho is known for. Children still in diapers cannot use the large bath.
How does the private open-air bath work?
Manten-no-Yu, on the top floor, is a reservable open-air bath for staying guests only. It runs from 15:00 to 24:00 in 50-minute slots starting on the hour, for 2,200 yen (tax included). Booking is by phone only, 10:30 to 18:30. It has no washing area or shower, there are steps on the way, and in winter the water can cool so much that it cannot be used.
Can I bathe with a tattoo?
The FAQ asks guests with tattoos not to use the large bath or the open-air bath. It also says the private open-air bath can be used, so a room with its own hot-spring bath plus Manten-no-Yu is the practical setup. Our tattoo and onsen guide covers the wider picture in Japan.
Meals at Kokuya
Where and what do I eat?
Dinner and breakfast are both served in the dining area; there is no in-room dining. There is a general dining room and private dining rooms, and one plan guarantees a private room, limited to three rooms a day. Dinner courses include the Yuzan course (for open-air-bath rooms only, with Joshu beef and the chef’s choice), the Tsubaki course with Joshu beef sukiyaki, and a pork sukiyaki course; each guest gets an individual pot. Breakfast is a Japanese set meal, from 7:30 at the earliest. Children can have a kids’ plate.
Can the inn handle allergies or a special diet?
Read this before you book. The inn says it cannot fully handle allergies: it will leave out an ingredient itself, but not extracts, stock, binders or seasonings, and because cookware is shared, any dish may contain allergens. Vegetarian and halal meals cannot be provided, and dislikes are not swapped. Pregnant guests can ask for raw fish and raw meat to be replaced, if noted at booking at least three days ahead. Outside food and drink are not allowed.
Getting to Kokuya in Ikaho Onsen
How do I get there by train or bus?
From JR Shibukawa Station, take the local bus and get off at Ikaho Onsen; the inn is a 2-minute walk. On the highway bus from Busta Shinjuku, get off at Ikaho Ishidangai and call the inn, which picks you up (about 3 minutes). On JR Bus Kanto’s Joshu Yumeguri-go, the stop is farther away, so call and the inn will come for you. The official pages do not list a regular shuttle from the station.
What if I drive?
Parking is free. The access page warns that car navigation can lead you to the narrow road behind the inn, so check the official access page before you set off. In snow, the inn says normal tires will not make it and recommends studless tires or chains.
Payment, children and cancellation at Kokuya
How do I pay?
The FAQ lists JCB, Visa, Mastercard, American Express, UC, DC, Diners and Saison. The shop, massage and a few other spots do not take cards, and PayPay and similar phone payments cannot be used. The pages we read do not mention cash.
Can children stay?
Yes, except in the Japanese-modern rooms and the Nishi-no-Miyabitei open-air-bath rooms. Meals for elementary school children and younger kids are offered; the official pages we read do not list child rates.
What about cancellation and the bathing tax?
The cancellation policy is not on the pages we could read; check it on the booking page or ask the inn, and see our hotel cancellation guide for how fees work in Japan. Shibukawa City charges a bathing tax of 150 yen per guest per day (100 yen if the base room rate is 6,000 yen or less); children under 12 are exempt. See our onsen bathing tax guide.
What foreign guests should know before staying at Kokuya
- The official website is in Japanese, with an automatic translation widget at the top.
- Plan to arrive before 18:00; later arrivals get no dinner but pay for two meals.
- Pick your room by its bath: six rooms have hot-spring open-air baths, four have plain water.
- The private bath is booked by phone only, so ask the front desk to help after you arrive.
- Diet needs are limited: no vegetarian or halal meals.
Frequently asked questions
What time is check-in at Kokuya?
Are all the open-air room baths at Kokuya hot spring?
Can I bathe at Kokuya with a tattoo?
Can Kokuya cater for allergies or a vegetarian diet?
Can I pay by card at Kokuya?
Bottom line (2026): Kokuya is an Ikaho Onsen inn of about 100 years with water straight from the source and yukata to borrow. Check in by 18:00 for dinner, choose one of the six rooms with a hot-spring bath, and read the allergy rules before you book.
Sources
Every fact on this page is from Kokuya’s official pages: home, rooms, hot spring, dining, facilities, access and FAQ and contact (all in Japanese), and the bathing tax from Shibukawa City. All were read on October 20, 2026. Prices and rules change; check the official site before you book.
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