Overview (history, characteristics, attractions)
Shima Onsen is a historic hot spring resort located in Nakanojo Town, Agatsuma District, Gunma Prefecture. The name "Shima" comes from a legend that the hot springs cure "40,000 illnesses," and the area has been popular as a therapeutic hot spring resort since the Edo period. Surrounded by the beautiful valley of the clear Shima River, the area is charming for its quiet mountain atmosphere and abundant nature. Small, charming inns line the area, and the open-air baths along the river, the quaint architecture of the long-established inns, and the valley scenery that changes with the seasons (fresh greenery, autumn leaves, snowscapes) attract visitors.
Highlights
- Sekizenkan: A long-established inn founded in the Edo period. The building's retro exterior is a popular photo spot, and it has also been mentioned as one of the inspirations for movies and anime.
- Shima River Valley and Shima Blue: The deep blue color of the clear stream (sometimes called "Shiman Blue") and the riverside promenade are perfect for strolling and taking photos.
- Lake Shima (Shiman River Dam): The natural scenery around the dam lake. The color of the lake surface is beautiful, and you can enjoy the scenery that changes with the seasons.
- Footbath/public bath: The hot spring town is dotted with facilities offering free or paid foot baths and day-use baths, allowing you to easily enjoy the hot springs in between your strolls.
- Valley walking trails and potholes: Riverside promenades and valley views. Ideal for nature observation and light hiking.
- Touring local hot springsEach inn has different baths (open-air baths, private baths, indoor baths, etc.), so you can enjoy bathing in different baths.
Access (nearest station, transportation, etc.)
- Train + Bus: Get off at Nakanojo Station on the JR Agatsuma Line. From Nakanojo Station, take the Kan-etsu Kotsu bus bound for Shima Onsen for approximately 40-50 minutes. The number of buses varies depending on the route and the time of year, so please check the timetable in advance.
- car: Take the Kan-etsu Expressway and access the national and prefectural roads from Shibukawa-Ikaho IC or Numata IC. From Shibukawa-Ikaho IC, it takes approximately 60 to 90 minutes by car (this varies depending on traffic conditions and the route). Please note that the roads in the hot spring town are narrow in some places, so driving carefully is recommended.
- Approximate travel time from Tokyo: Approximately 2-2.5 hours by train (Tokyo → Takasaki → Nakanojo → bus). Approximately 2.5-3 hours by car (depending on traffic conditions).
Estimated stay (estimated time required)
- Day trip: 3-5 hours for hot spring bathing and light walking. Please check in advance whether facilities offer day-use bathing.
- 2 days and 1 night (recommended): Perfect for relaxing in the hot springs, enjoying evening and morning baths, strolling around the hot spring town, and exploring the surrounding nature.
- 2 nights or more: Suitable for a relaxing stay that includes sightseeing in the surrounding area (events such as the Nakanojo Biennale, visiting nearby hot springs, hiking).
Nearby spots
- Nakanojo Town area (seasonal Nakanojo Biennale: outdoor contemporary art venues, abandoned school venues, etc.)
- Kusatsu Onsen (about an hour or so by car) - A representative hot spring resort in Gunma, and plans to visit both places are popular.
- Agatsuma Valley and scenic spots along the Agatsuma Line (suitable for nature walks and drives)
- Nearby hiking trails and mountain sightseeing spots (the fresh greenery of spring and the beautiful autumn leaves)
Things to be aware of (crowds, manners, seasonal precautions, etc.)
- congestion: Accommodation and day-trip facilities tend to be crowded on weekends and consecutive holidays (Golden Week, Obon, autumn foliage season). We recommend making reservations early for popular accommodations.
- MannersPlease observe proper onsen etiquette (wash your body before entering, do not put towels in the water, and stay quiet). Some inns and public baths may refuse entry to those with tattoos. If you have any concerns, please check with the facility in advance.
- Transportation/bus numbers: There are not many buses running, so be sure to check return times in advance and plan your trip with plenty of time. In winter, travel times may be longer due to frozen roads and snow accumulation.
- Seasonal precautionsIn winter, roads can become slippery due to snow and ice, so be sure to bring chains and winter tires. In spring, the mountainous areas experience sudden weather changes, and in summer, more people visit to enjoy the fresh greenery and escape the heat. In autumn, the area is extremely crowded with visitors due to the autumn leaves.
- natural environment protection: Please be considerate of nature conservation by taking your trash home with you when you are in the valley or on the walking trails and not picking plants.
Shima Onsen is a hot spring resort with a tranquil hot spring town and untouched nature. You can experience the hot spring atmosphere even with a short stroll, but it is recommended to stay overnight if possible and enjoy the hot springs in the evening and early morning, as well as the changing scenery of the valley. When visiting, be sure to check in advance about transportation options and whether day trips are available.
