Gunma Prefecture Travel Guide: Hot Springs, Mountains and Culture
Contents
Gunma is a prefecture in Japan’s Kanto region, with historic hot-spring towns, mountain scenery, outdoor activities and cultural sites. The best place to stay depends on what you want to do: Kusatsu and Ikaho are known for their hot springs, Minakami is introduced for rafting, and Tomioka for its World Heritage silk mill. These destinations are spread across the prefecture, so it is worth choosing a main area before planning day trips.
A practical plan starts with the whole journey, not just the train ride from Tokyo. JNTO gives an approximate journey time of 50 minutes from Tokyo to Takasaki on the Joetsu Shinkansen, but you will need to check onward trains or buses, the final walk and the return connection for your actual destination. Opening hours, seasonal conditions and transport can also affect what fits into a day.
1. Choose a Gunma destination
Match your base to your main activity
Choose Kusatsu if you want a hot-spring town whose centre is the Yubatake, or “hot-water field.” The neighbouring Netsunoyu introduces yumomi, a traditional demonstration involving hot-spring water, and the town also has hot-spring inns. See the official Kusatsu destination guide for the town’s main attractions and seasonal context.
Ikaho is another historic hot-spring area. Its outdoor bath has specific seasonal hours and regular closing days, so it is important to check the facility details rather than assuming that a visit will fit any time of day. The Ikaho tourism association’s bath information provides its current published address, hours, admission and access from Kajikabashi parking.
For outdoor activity, JNTO introduces rafting in Minakami. For a cultural visit, it highlights Tomioka Silk Mill as a World Heritage site. Check the operator or site’s own information for conditions on your dates, and do not assume that either destination will combine easily with a hot-spring town in one day. JNTO’s Gunma guide is a useful starting point for comparing these broad trip themes.
| Destination | What the official sources introduce | Practical first check |
|---|---|---|
| Kusatsu | Yubatake, hot-spring inns and yumomi at Netsunoyu | Your chosen bath’s conditions and onward transport |
| Ikaho | A historic hot-spring area and an outdoor bath | Seasonal hours and regular closing days |
| Minakami | Rafting | The operator’s season and booking conditions |
| Tomioka | Tomioka Silk Mill, a World Heritage site | Current opening information and the travel connection |
Include food and regional interests in your choice
JNTO names yakimanju and Mizusawa udon among Gunma’s food specialties. If a particular meal is an important part of your trip, check the restaurant’s own information for opening days, ingredients, prices and accepted payment methods before travelling there. The general prefecture guide does not establish those details for individual restaurants.
Gunma includes both towns and mountain areas, so decide whether your priority is a hot-spring stay, an outdoor activity or a cultural visit before choosing a base. JNTO introduces rental cars as one way to travel around the prefecture, alongside local trains and buses. A car may affect which places you can combine, but it does not remove the need to check route and weather information for mountain travel.
For the next part of your trip, see [Gunma food guide], [Things to do in Gunma] or [How to get to Nagano].
2. Getting to Gunma and planning the onward journey
Travel via Takasaki
JNTO lists the Joetsu Shinkansen from Tokyo to Takasaki and gives an approximate journey time of 50 minutes. This is a guide estimate, not a confirmed time for every service, so look up the timetable for your date. JNTO also describes local trains and buses for onward journeys to other parts of Gunma. See JNTO’s transport and destination overview when beginning your search.
The journey to Takasaki is only the first leg if you are staying in a hot-spring town or visiting a mountain destination. The time and convenience of the complete trip depend on the onward service, any transfers and the final walk to your accommodation or bath. Compare the return journey as well as the outward journey before you reserve a room, particularly if you plan to travel on a schedule that leaves little time between connections.
Check each leg before you book
Use these steps to confirm a workable journey:
- Search the rail operator’s timetable for your travel date and the train to Takasaki.
- Check the local railway or bus operator’s schedule for the onward destination.
- Compare transfer and return times, then check whether they fit the accommodation you are considering.
- Open the accommodation’s access information or contact the property about the final leg.
- If driving in the mountains, check current road, weather and volcanic notices for your specific route.
The general destination information available for this guide does not establish whether a mountain road will be open on a particular day. Likewise, it does not confirm the current departure time of any individual train or bus. Treat the approximate Tokyo–Takasaki time as a planning starting point and verify the full journey with the relevant operator before travelling.
3. Kusatsu Onsen: Yubatake, yumomi and public baths
See the town centre and check mountain conditions
Yubatake is in the centre of Kusatsu, and Netsunoyu is next to it. Netsunoyu presents yumomi, a traditional demonstration involving the hot-spring water, while the town also has hot-spring inns. These attractions give a visitor several reasons to allow time in the town itself rather than treating Kusatsu only as a place to sleep. The official Kusatsu guide introduces the town and its surroundings.
The same guide places the Yoshigadaira wetlands within Joshin’etsukogen National Park, northeast of Mount Kusatsu-Shirane. It also describes Kusatsu’s usual ski season as late December through late March, but that seasonal guide is not confirmation of opening dates for a particular year. Check current weather, road and any relevant access notices before planning a mountain outing or a ski visit.
Compare published bath information
Otakinoyu publishes its general opening hours as 9 a.m. to 9 p.m., with last admission at 8 p.m. Its listed admission is ¥1,200 for an adult and ¥600 for a child, and a towel-and-bath-towel rental set is listed at ¥250. The facility lists credit cards and electronic money among its accepted payment methods. Check the Otakinoyu official guide before setting out in case details have changed.
Otakinoyu also lists reception for its private bath from 9 a.m. to 7 p.m., with the final start at 6 p.m. The current private-bath price, availability and requirements for a particular group are not established by the information used here, so contact the facility to confirm them. Ask what the final payment includes: private-bath use and general admission are distinct choices, and the published information here does not establish the complete cost of a private visit.
The Kusatsu tourism association’s price revision, dated 1 September 2025, lists Gozanoyu at ¥900 for an adult and ¥450 for a child. The same revision lists a three-bath pass at ¥2,100 for an adult and ¥1,050 for a child. Before purchasing, check the association’s price-revision information for current terms and participating facilities; a pass is useful only if its conditions match the baths you plan to visit.
| Bath or option | Published price | Published hours or conditions | What to verify |
|---|---|---|---|
| Otakinoyu, general admission | Adult ¥1,200; child ¥600 | 9 a.m.–9 p.m.; last admission 8 p.m. | Current facility conditions; towel set is ¥250 extra |
| Otakinoyu, private bath | Price not established here | Reception 9 a.m.–7 p.m.; final start 6 p.m. | Current price, availability and group requirements |
| Gozanoyu | Adult ¥900; child ¥450 | Price revision dated 1 September 2025 | Current facility details |
| Kusatsu three-bath pass | Adult ¥2,100; child ¥1,050 | Price revision dated 1 September 2025 | Current terms and participating baths |
4. Ikaho: outdoor bath details and comparison
Check hours, closures and facilities
The Ikaho outdoor bath is at 581 Ikaho, Ikaho-machi, Shibukawa. The tourism association lists its opening hours as 9 a.m. to 6 p.m. from April through September and 10 a.m. to 6 p.m. from October through March. Last entry is 5:30 p.m., so arriving close to closing time is not the same as arriving before the facility closes.
Admission is listed as ¥600 for adults and ¥300 for elementary-school children and younger. The association describes the bath as using koganenoyu hot-spring water on a flow-through basis. The bath has no washing area, an important practical difference from a facility where visitors can wash before bathing; check the Ikaho tourism association’s official information before your visit.
The bath normally closes on the first and third Thursdays. The listing says it opens on public holidays and has no regular closure in August, but check the day’s notice rather than relying on a standard weekly pattern alone. It is approximately a five-minute walk from Kajikabashi parking, so allow for that walk when planning a visit with children or anyone who needs an easier route.
Choose between Kusatsu and Ikaho by the details that matter
Otakinoyu’s listed adult admission is ¥1,200, compared with ¥600 at the Ikaho outdoor bath. The prices are for different facilities, so they are not a like-for-like measure of the bathing experience: the Ikaho listing specifically notes that there is no washing area, while Otakinoyu publishes towel rental and payment information. Compare the facilities and practical conditions, not just the headline admission.
The Kusatsu three-bath pass is listed at ¥2,100 for an adult, while Gozanoyu is listed at ¥900 for an adult under the 2025 price revision. These figures can help frame a comparison, but the pass’s current terms and participating facilities should be confirmed before purchase. The Ikaho outdoor bath is a separate option with seasonal hours, scheduled closing days and a short walk from the stated parking location, so include those details when deciding which bath suits your day.
5. Seasons, budget and trip planning
Plan around the season without assuming opening dates
Visit Gunma describes the usual Kusatsu ski season as late December through late March. This is a seasonal guide, not a confirmation that the ski area will open on particular dates in a given year. Check current information for the season you plan to visit, especially if skiing is the main reason for your trip.
The same official Kusatsu guide describes Manza Onsen as a hot-spring area at approximately 1,800 metres in elevation. That elevation is useful context when considering a mountain destination, but it does not tell you whether a road or route will be open on your travel day. Check current operator notices, road information and weather if your plans depend on reaching a mountain area.
The Yoshigadaira wetlands are another outdoor possibility in the Kusatsu area, within Joshin’etsukogen National Park and northeast of Mount Kusatsu-Shirane. General visitor information does not establish the current conditions for every route or access point. Confirm the specific access information and any relevant restrictions before making this the centrepiece of a day out.
Build a budget from confirmed choices
There is no single total trip budget established for this guide because the dates, accommodation, meals and transport have not been fixed. The bath prices above are admission costs, not a full trip estimate, and they do not include a hotel stay, meals or your complete journey. To estimate your own total, check the prices for the actual transport and accommodation you are considering, then add the relevant bath admissions and any separately listed items such as the Otakinoyu towel set.
When contacting an inn, ask for the total for your group and dates, whether meals are included and what cancellation terms apply. Confirm the final transport leg before reserving accommodation, particularly if the property’s access information or return connection affects your travel plan. These checks are more useful than relying on a general prefecture-wide figure that does not account for your itinerary.
Use social posts as inspiration, not booking information
The following posts offer individual perspectives on Gunma destinations. They may help you decide what interests you, but use current official sources for transport, admission, opening conditions and booking.
- A Japanese Gunma overview reel features Kusatsu and Tomioka: Instagram.
- A Minakami travel reel introduces a mountain and hot-spring setting: Instagram.
- JNTO Australia’s Shima Onsen reel shows the town at night: Instagram.
- A Japanese Tomioka Silk Mill post presents a visitor’s view of the site: Instagram.
- JNTO Thailand’s yumomi reel introduces the Kusatsu demonstration: Instagram.
- A Chinese-language Ikaho post discusses the hot-spring town: Facebook.
- A Japanese autumn scenery video introduces several Gunma destinations: YouTube.
6. Gunma travel guide FAQ
How long does it take to get from Tokyo to Gunma?
JNTO gives an approximate journey time of 50 minutes on the Joetsu Shinkansen from Tokyo to Takasaki. The time depends on the train service, so check the timetable for your date rather than treating the estimate as a guaranteed departure-to-arrival time. Takasaki is not necessarily your final destination: check the onward local train or bus, the final walk and the return connection as well.
How much does a visit to Otakinoyu cost?
Otakinoyu lists admission at ¥1,200 for an adult and ¥600 for a child. A towel-and-bath-towel rental set is listed at ¥250, and the facility lists credit cards and electronic money among its accepted payment methods. Check the official Otakinoyu guide for current conditions; the private-bath price and requirements are not established here and should be confirmed with the facility.
Does the Ikaho outdoor bath have a washing area?
No: the Ikaho tourism association’s listing says that the outdoor bath has no washing area. The same listing gives seasonal opening hours, a 5:30 p.m. last entry and regular closures on the first and third Thursdays, with the stated public-holiday and August exceptions. Check the association’s current information before travelling, and allow for the approximately five-minute walk from Kajikabashi parking.
Is the Kusatsu three-bath pass worth buying?
The Kusatsu tourism association’s price revision dated 1 September 2025 lists the pass at ¥2,100 for an adult and ¥1,050 for a child. Whether it suits your plan depends on the current participating baths and terms, as well as how many of those baths you intend to visit. Confirm those details with the Kusatsu tourism association before deciding; do not assume that the published price alone establishes current eligibility or availability.
