Three Areas to Explore at Odaira Village
Odaira Village is broadly divided into three areas: the Limestone Cave and Wetland Botanical Garden Area, the Riverside Park Area, and the Campground Area.
Together, these areas offer opportunities to experience nature, local history, food, outdoor activities, and relaxation in a single destination.
Limestone Cave and Wetland Botanical Garden Area
Odaira Limestone Cave — A Fascinating Natural Heritage Site
The centerpiece of Odaira Village is Odaira Limestone Cave. It was discovered in 1874 while limestone was being quarried for use at the Ashio Copper Mine. The entrance became buried approximately ten years later, and the cave subsequently disappeared from public knowledge for many years.
In 1984, researchers began investigating the area again based on old documents and local traditions, leading to the rediscovery of the cave.
The cave is relatively small, with a total length of approximately 93 meters, but it contains a variety of unusual geological formations. In addition to stalagmites and flowstone, formations such as helictites and boxwork, which are relatively rare in Japan, have been identified, giving the cave considerable scientific value.
The temperature inside the cave remains relatively stable at around 13–15°C throughout the year, making it pleasantly cool in summer and comfortable for exploration.
In 1988, the cave was designated a Natural Monument of the former Ōmama Town, now part of Midori City, and was reopened to the public for the first time in approximately a century.
Today, safety improvements allow visitors to explore the cave while experiencing the mysterious beauty of its natural formations at close range.
Odaira Wetland Botanical Garden — Seasonal Flowers Throughout the Year
Near the exit of the limestone cave is the Odaira Wetland Botanical Garden. Approximately 200 species of wetland plants and wildflowers grow here, providing seasonal color throughout the year.
Early spring brings flowers such as Adonis ramosa and Primula kisoana. In spring, visitors can see rhododendrons and Japanese primroses, while summer brings Japanese mountain lilies and crape myrtles. Autumn features bush clover, and winter brings the fragrant yellow blossoms of wintersweet.
The botanical garden is included in the combined admission ticket for the limestone cave, making it a pleasant place for nature observation and photography.
Mamianatei and Fureai-no-Yakata — Local Food and Regional Products
At the restaurant Mamianatei, visitors can enjoy handmade udon and soba noodles made using locally produced flour.
The adjacent Fureai-no-Yakata sells locally grown agricultural products and regional specialties. Visitors can also try hands-on udon and soba noodle-making experiences, offering a chance to connect with the local food culture.
Riverside Park Area — A Peaceful Place of Clear Water and Greenery
Enjoying the Clear Waters of the Odaira River
Odaira Village Riverside Park is a waterside park developed around the clear waters of the Odaira River.
The river is shallow and has a gentle flow, making it suitable for children to enjoy playing in the water under appropriate supervision. The grassy area includes slides and combination playground equipment, and the park becomes especially popular with families during the summer.
Advance reservations are required for the popular trout-catching experience, which provides children with a fun hands-on introduction to nature and food.
Noguchi Waterwheel Preservation Museum — A Working Industrial Heritage
The grounds are also home to the Noguchi Waterwheel Preservation Museum, where the historic indoor Noguchi Waterwheel, built in 1910, is preserved and displayed.
The waterwheel has a diameter of 5.64 meters, making it one of the largest of its kind in Japan. It once provided power for local industries, including rice polishing, flour milling, and silk-thread production.
After falling out of use following World War II, the waterwheel was donated to the local town in 1990. Following restoration, it continues to operate today, actually being used for rice polishing and flour milling.
The sound of the traditional waterwheel turning, together with the atmosphere of the wooden building, provides visitors with a nostalgic glimpse into the area’s industrial heritage.
Campground Area — Outdoor Adventures and a Traditional Bath
Well-Equipped Camping Facilities
The Odaira Village Campground offers a variety of accommodation and outdoor facilities, including bungalows and cottages of different sizes, rental tents, and barbecue houses.
Camping equipment can also be rented, making the site accessible to both beginners and experienced campers. At night, visitors can enjoy a campfire beneath a sky full of stars, while the outdoor stage hosts events and concerts on selected occasions.
Yuyukan — A Hinoki Bath Heated with Firewood
Within the campground is Yuyukan, a day-use bathing facility known for its traditional bath heated with firewood using natural spring water.
Relaxing in a fragrant Japanese cypress bath after a day outdoors provides a particularly refreshing experience. It is an ideal place to stop after playing in the riverside park or as a relaxing end to a camping trip.
A Scenic Route Connecting Nature and Local History
Odaira Village is also located along the Gunma Prefecture section of the Kanto Fureai Trail, a network of walking routes designed to connect visitors with the region’s natural and cultural landscapes.
The area can also be combined with a visit to Takatsudo Gorge, making it possible to enjoy a longer walking excursion through the surrounding countryside.
The route has also been selected as one of the 500 Beautiful Japanese Walking Trails, recognizing the area’s combination of scenic landscapes and historical resources.
Access
Odaira Village is approximately 11 minutes by car from Ōmama Station on the Watarase Keikoku Railway and approximately 14 minutes by car from Akagi Station on the Tōbu Kiryū Line and Jōmō Electric Railway.
By car, it is approximately 25 minutes from the Ōta-Yabuzuka Interchange of the Kitasakanto Expressway.
Free parking is available, and the facilities can also accommodate group visits.
A Satoyama Destination Combining Recreation, Learning, and Relaxation
Odaira Village brings together a limestone cave where visitors can experience the mysteries of nature, a riverside park with clear water and grassy spaces, a historic working waterwheel, camping facilities, and a traditional bathing experience.
Surrounded by seasonal flowers and the peaceful scenery of the satoyama countryside, the complex offers a wide variety of activities for families, friends, and travelers looking to enjoy nature at a relaxed pace.
At Odaira Village, where nature, history, local culture, and human connection come together, visitors can spend a memorable day experiencing a different side of Gunma.