What is Shima Onsen in Gunma Prefecture?
Shima Onsen (shima onsen) is a historic hot spring resort located in Nakanojo Town, Agatsuma District, Gunma Prefecture, known as one of Kanto’s famous hot springs.
The name comes from the highly therapeutic waters said to cure as many as 40,000 ailments.
Discovered around 1,200 years ago according to tradition, this hot spring area lies quietly in the mountains and offers beautiful nature and the atmosphere of a traditional onsen town.
The ryokan Sekizenkan, said to be one of the inspirations for the film “Spirited Away,” and the emerald-green waters of the Shima River Dam are just a few of the many attractive sightseeing spots.
This article explains the charms of Shima Onsen, how to enjoy it, and useful practical information in detail.
Highlights of Shima Onsen
Sekizenkan
The ryokan Sekizenkan, which symbolizes Shima Onsen, is known as Japan’s oldest wooden hot-spring inn building.
Founded about 300 years ago, this inn is especially popular for photo spots such as the red bridge and the main building.
Inside Sekizenkan is the atmospheric hot spring called “Genroku no Yu,” where you can enjoy a healing soak while taking in the historical atmosphere.
It is rumored to have inspired the film “Spirited Away,” and many tourists visit from both inside and outside Japan.
Shima Blue’s Clear Stream
Shima Onsen is located in an area where the pure Shima River flows.
In particular, the lake formed by the Shima River Dam, “Oku-Shima Lake,” is famous for its beautiful emerald-blue surface known as “Shima Blue.”
The water’s color changes with the seasons and weather, and this mysterious scenery fascinates visitors.
A walking path is maintained along the lakeshore, making it perfect for enjoying nature on a stroll.
You can also take part in activities such as canoeing and stand-up paddleboarding (SUP).
Hinatami Yakushi Hall
At the center of Shima Onsen is Hinatami Yakushi Hall (Hinata-mi Yakushi-dō), a wooden Yakushi hall built during the Edo period.
Locals and tourists visit this spot to pray for good health; it has a quiet, calming atmosphere befitting a hot spring town.
Next to the hall there is a free foot bath, perfect for a short rest during sightseeing.
Free Communal Baths in Shima Onsen
Shima Onsen has several communal baths that can be used free of charge.
- Kawara no Yu
- Gomuso no Yu
- Ue no Yu
These baths are beloved by local residents and are also easy for tourists to use, which is part of their charm.
Enjoying the different atmospheres of each bath is a unique Shima Onsen experience.
Activities to Enjoy at Shima Onsen
Onsen Hopping
The town of Shima Onsen has many hot spring inns of various sizes, each offering different sources and health benefits.
Purchasing an “onsen pass” allows day-use bathing at multiple inns, making it recommended for those who want to enjoy onsen hopping.
Nature Walks
The area around Shima Onsen has many hiking courses where you can enjoy beautiful nature.
In particular, the “Shima Potholes” (Shima no Ouketsu-gun) are mysterious rock hollows formed by the river’s flow, a spot where you can appreciate nature’s sculptural beauty.
Canoe and SUP Experiences
At Oku-Shima Lake formed by the Shima River Dam, you can enjoy water activities such as canoeing and SUP.
Beginner-friendly tours are also offered, so even first-timers can try them with confidence.
Access to Shima Onsen
By Train
- Get off at JR Takasaki Station or Nakanojo Station.
- From Nakanojo Station, take a bus bound for Shima Onsen — about 40 minutes.
By Car
- About 1 hour via Route 353 from the Kan-Etsu Expressway’s Shibukawa-Ikaho IC.
- There are several parking lots in Shima Onsen, making access by car convenient.
Practical Information for Travelers
Recommended Accommodations
Shima Onsen offers a wide range of accommodations, from long-established ryokan to modern inns.
In particular, Sekizenkan and Shima Yamaguchikan are popular lodgings where you can fully enjoy the hot springs and cuisine.
Gourmet Information
- Shima Burger: a local burger made with regional ingredients.
- River Fish Dishes: dishes made with fresh yamame (landlocked salmon) and iwana (char).
- Onsen Manju: a popular souvenir sweet from the Shima Onsen area.
Best Seasons to Visit
Shima Onsen can be enjoyed year-round, but the following seasons are especially recommended:
- Spring (April–May): fresh greenery and blooming flowers.
- Autumn (October–November): autumn leaves color the onsen town and surrounding mountains, creating spectacular views.
Frequently Asked Questions When Visiting Shima Onsen
Q. Can anyone use the communal baths?
A. Yes. They are free or available for a small fee, and tourists can use them easily.
Q. Are there English guides available?
A. Yes. The tourist information center and some accommodations can provide English assistance. Some signs also include English.
Q. Can I enjoy Shima Onsen as a day trip?
A. Yes. Many facilities offer day-use bathing, so you can enjoy the hot springs along with a stroll around the town.
Summary
Shima Onsen is a special destination that blends beautiful nature with a rich onsen culture.
Through historic buildings, scenic spots, and a variety of activities, you can enjoy a journey that heals both body and mind.
If you visit Gunma Prefecture, be sure to stop by Shima Onsen and experience its charms for yourself.
You’ll spend a special time and make unforgettable memories!
