Konnyaku Cuisine: Gunma Low-Calorie Bounty

Gunma is a major producing region, accounting for the vast majority of Japan konjac potato harvest, the raw material for konnyaku. In some years the prefecture makes up more than ninety percent of the national crop. Around Shibukawa there are even dedicated facilities, sharing the appeal through varied dishes from dengaku to sashimi-style konnyaku and simmered fare.

Highlights

Its springy, distinctive texture and its knack for soaking up flavor are the draw. Dengaku, skewered and brushed with miso, is a rustic classic. Sliced thin and dressed with vinegar miso, sashimi konnyaku offers a cool, smooth slide down the throat. It is also used widely as an ingredient in oden, simmered dishes, and soups, blending into any dish because it absorbs flavor so well. Very low in calories and rich in fiber, it is a food that pleases health-conscious travelers.

Enjoying the Seasons

In winter, oden and simmered dishes serve it warm, a slice steeped slowly in flavor to heat the body. In summer, chilled sashimi konnyaku makes a light palate refresher. Forms you can enjoy year-round, such as konnyaku jelly and dengaku, are also plentiful, a hallmark of Gunma.

Access and Basic Information

At sightseeing facilities and farm stands around Shibukawa, you can enjoy everything from freshly made konnyaku to related sweets. Some places offer hands-on making experiences, popular with families. Being close to Ikaho Onsen and the Mizusawa udon shops, it is an easy stop while combining hot springs and food on a trip.

Practical Travel Notes

• Serving area: centered on Shibukawa, it is sold and served at konnyaku-themed facilities, farm stands, and roadside stations.
• Budget guide: dengaku and sashimi konnyaku generally sit in an approachable price range as a light bite or small dish.
• Takeout: keepable souvenirs abound, such as raw konnyaku, miso-dengaku kits, and konnyaku jelly, and they are light to carry.
• Experience: some facilities run hands-on making sessions, suiting family and group trips.
• Nearby spots: the stone-stairway town of Ikaho Onsen and the Mizusawa udon street before Mizusawa Temple are close, an easy area to combine hot springs with food.

A Quick Tip

Parboiling to remove any odor is the key to great flavor. Simple seasonings like miso or vinegar miso bring out the ingredients own character best.

Practical Information for Your Visit

• The reality of production: According to the official Gunma Prefecture website, for the Reiwa 6 (2024) crop Gunma accounted for about 92% of the national konjac potato cultivation area and about 97% of the national harvest. The main producing areas are Showa Village, Shibukawa City, Annaka City, Numata City, Higashiagatsuma Town and Tomioka City, and Showa Village has the largest cultivation area in the country.
• Public tourist facility where you can taste it: Konnyaku Park (204-1 Obata, Kanra-machi, Kanra-gun / TEL 0274-60-4100). It is open 9:00-18:00 (last admission 17:00), and tours of the production lines for konnyaku, shirataki noodles, jelly and miso dengaku are free of charge. Hands-on courses such as making konnyaku by hand cost 660-1,100 yen (tax included) and are held in time slots between 9:30 and 16:30.
• Access: About 2.4 km from Joshu-Fukushima Station. There is parking for 400 vehicles, free of charge.

Note: Opening hours and prices vary from one establishment to another.

(Sources: Gunma Prefecture, Konnyaku Gourmet Grand Campaign; official Gunma Prefecture tourism website Kokoro ni Gugutto Kanko Gunma, Konnyaku Park page; Kanra Town Tourism Association, Kanra Ittenbee)

Information Sources

This article is compiled from tourist information provided by Gunma Prefecture together with information published by the individual shops and facilities. Prices and product details are subject to change, so please check the official information of each establishment for details.

Sightseeing Checklist

• Budget guide: Affordable, from a few hundred yen a bag, with assortment sets also available
• Where to eat it: Souvenir shops in Shimonita, Kanra and elsewhere, and Konnyaku Park
• Recommended time of day: Available all year round; products that keep well make a good purchase at the end of a trip
• Avoiding the crowds: The souvenirs are well stocked and easy to buy
• Enjoy it together with: The factory tour and tastings at Konnyaku Park, and the town of Shimonita