Shiga Prefecture’s Traditional Food “Aka Konnyaku” — What’s the Secret Behind Its Vivid Red Color?
There are many types of konnyaku across Japan, but the one especially famous in Shiga Prefecture is “aka konnyaku” (red konnyaku).
Unlike ordinary konnyaku, it is characterized by a striking bright red appearance and is deeply rooted in Shiga’s food culture.
This article explains in detail the features, history, best ways to eat aka konnyaku, and where to buy it!
What is Aka Konnyaku? — A Unique Traditional Food from Shiga
1. Characteristics of Aka Konnyaku
Aka konnyaku is a unique food that, unlike regular konnyaku, has a vivid red color.
However, this color is not from synthetic dyes; it is colored red using a food additive called iron oxide (ferric oxide).
Aka konnyaku has a pleasant springiness and a slightly firmer texture than typical konnyaku.
Details: vivid red color Texture slightly firmer than regular konnyaku Taste mild, pairs well with various dishes.
Main uses: simmered dishes, stir-fries, sukiyaki, oden.
Place of origin: Omihachiman City, Shiga Prefecture.
2. The secret of the red color — Why is it so red?
The vivid red color of aka konnyaku comes from iron oxide (oxidized iron).
It is made using a traditional method rich in iron, and it is also notable for its high nutritional value.
Because it is rich in iron, it has attracted attention as a food that may help prevent anemia and support health.
History of Aka Konnyaku and Its Connection to Omihachiman
1. A traditional food with a history of over 400 years
The history of aka konnyaku is said to date back about 400 years.
There are various theories about its origins and no definitive historical records, but one story says that around the time Oda Nobunaga built Azuchi Castle, he ordered even food to be made showy, and konnyaku was dyed red — that is said to be one possible beginning.
2. Established as a local dish in Omihachiman
Aka konnyaku is firmly rooted in the local food culture, especially around Omihachiman City in Shiga Prefecture.
It is often eaten at festivals and memorial services, and
you can also enjoy various aka konnyaku dishes at local restaurants.
Delicious Ways to Eat Aka Konnyaku and Popular Recipes
1. Eat it as-is (sashimi konnyaku style)
Aka konnyaku has a mild flavor, so it’s recommended to slice it and eat with wasabi soy sauce or ponzu.
Its unique springy texture makes it a low-calorie, healthy snack or appetizer.
2. Use in simmered dishes and stir-fries
Aka konnyaku absorbs flavors well, making it ideal for simmered dishes and stir-fries!
- As an ingredient in sukiyaki, it adds a festive look.
- Adding it to oden lets it soak up the broth and doubles the deliciousness.
3. Popular aka konnyaku recipe
① Spicy Stir-Fried Aka Konnyaku
Ingredients:
- Aka konnyaku … 1 piece
- Sesame oil … 1 tbsp
- Soy sauce … 2 tbsp
- Mirin … 1 tbsp
- Sugar … 1 tsp
- Chili pepper … 1
How to make it:
- Cut the aka konnyaku into bite-sized pieces and briefly boil in hot water.
- Heat sesame oil in a frying pan, add the chili pepper and aka konnyaku, and stir-fry.
- Add soy sauce, mirin, and sugar, and simmer until the flavors coat the konnyaku.
- When the flavors are well absorbed, it’s done!
Where to Buy Aka Konnyaku and Recommended Shops
1. Roadside stations and supermarkets in Omihachiman
- “Michi-no-Eki Omihachiman” sells fresh aka konnyaku.
- It is relatively easy to find in supermarkets throughout Shiga Prefecture.
2. Long-established aka konnyaku specialty shops
- “Kawamotoya Honten” (over 100 years since founding): their traditionally made aka konnyaku is popular.
- “Nishikawa Konnyaku-ten”: sells handmade aka konnyaku.
3. Available from online shops too
Aka konnyaku can also be purchased from online marketplaces like Rakuten and Amazon.
Practical Information for Travelers
1. Enjoy it together with sightseeing in Omihachiman
The production area of aka konnyaku, Omihachiman, has many historic sightseeing spots.
- Omihachiman waterways (scenic boat cruises)
- Hachiman-bori (famous as a film location)
- Himure Hachiman Shrine (a historic shrine)
2. Notes when bringing it home as a souvenir
Aka konnyaku can be kept at room temperature for transport, but it’s best to eat it as soon as possible.
The shelf life is about 1 week to 10 days, so it’s a good item to enjoy during your trip.
Summary and Frequently Asked Questions
Summary
- Aka konnyaku is a traditional food from Omihachiman in Shiga Prefecture!
- Passed down for about 400 years; a nutritious food rich in iron.
- Can be used in many dishes such as sukiyaki, simmered dishes, and stir-fries.
- Available at Michi-no-Eki in Omihachiman, local supermarkets, and online.
Frequently Asked Questions
Q: Why is aka konnyaku red?
A: Because it contains iron oxide.
Q: What dishes does it go well with?
A: It’s great in sukiyaki, simmered dishes, oden, stir-fries, and more.
Q: Where can I buy aka konnyaku?
A: You can buy it at supermarkets and roadside stations in Shiga Prefecture, and from online shops.
Finally
If you visit Shiga, be sure to try aka konnyaku!
Beyond its visual impact, it’s a traditional food with appealing texture and flavor.
When sightseeing in Omihachiman, don’t miss the chance to enjoy local aka konnyaku dishes!
