Konnyaku (Konjac)

곤약Gonyak

Amorphophallus konjac

蒟蒻(Gonyak) - Konjac — the gelatinous food made from the corm of the konjac plant

Konnyaku has been a cornerstone of Japanese Buddhist temple cuisine since the Kamakura period (13th century). Made by mixing konjac corm flour with water and calcium hydroxide, the resulting grey-speckled jelly block is almost zero-calorie yet deeply satisfying. Zen monks valued it as 'sand sweeper of the stomach' for its ability to cleanse the digestive tract. In shojin ryori, konnyaku is a master of disguise — it can be torn, sliced, or formed into noodles, each preparation creating a different textural experience. The grey speckled variety includes hijiki seaweed for color, while pure white konnyaku is made from refined flour. In Korea, 곤약 is gaining popularity as a diet food, but its temple cuisine heritage runs much deeper.

New to Konnyaku (Konjac)?

Is this edible?

Yes! Konjac (konnyaku) is a root vegetable product eaten widely across Korea and Japan, valued for its unique bouncy-jelly texture and near-zero calories. It has been consumed in East Asian cuisine for over a thousand years.

What does it taste like?

Nearly flavorless on its own — the appeal is entirely textural. It has a unique springy, chewy, almost rubbery bounce that absorbs surrounding flavors beautifully. Think of it as a flavor sponge with a fun texture.

Where to buy

Korean or Japanese grocery stores (H Mart, Uwajimaya) sell it in blocks, noodle form (shirataki), or sheets in the refrigerated section. Shirataki noodles are increasingly available at regular supermarkets like Whole Foods and Trader Joe's.

How to prepare

Rinse well and boil for 2-3 minutes to remove any residual odor. Tear or cut into pieces. Dry-fry in a pan before adding to other dishes — this removes excess moisture and helps it absorb sauce.

Pro tip: Score the surface with a crosshatch pattern before braising — this dramatically increases the surface area and lets it absorb much more sauce and flavor. Without scoring, the slippery surface sheds seasonings.

Traditional Medicine

Source: Traditional East Asian Medicine

Nature (性)

Cold (寒)

Flavor (味)

pungent

Target Organs (歸經)

stomach, Liver (肝)

Benefits

digestion
Rich in dietary fiber, it promotes intestinal movement and prevents constipation
식이섬유가 풍부하여 장운동을 촉진하고 변비를 예방한다
Source: Traditional East Asian Medicine
detox
Absorbs and helps expel waste products from the body
체내 노폐물을 흡착하여 배출을 돕는다
Source: Traditional East Asian Medicine

Key Compounds

Glucomannan (soluble fiber)CalciumIronCeramides

This information is based on traditional Korean medicine texts (Donguibogam) and is for cultural reference only. It does not constitute medical advice.

Seasonal Availability

Available year-round

Available year-round in block, noodle (shirataki), or sheet form at Asian grocery stores. Fresh konjac corms are harvested in autumn.

Culinary Profile

Flavor

Essentially flavorless — a neutral canvas that absorbs surrounding flavors from broths and sauces

Texture

Firm, bouncy, and jelly-like with a distinctive chewy snap — unlike any Western food

Common Uses

Simmered in oden and nabe hot potsShirataki noodles in sukiyaki and soupsStir-fried with vegetables (kinpira style)Dengaku (grilled with miso glaze)Low-calorie noodle substitute

Western Substitutes

Shirataki noodles (same product, noodle form — widely available in Western supermarkets)Extra-firm tofu (for bulk and texture, though different mouthfeel)No true Western equivalent for the jelly block form

Konnyaku (Konjac)

New to Konnyaku (Konjac)?

Traditional Medicine

Benefits

Key Compounds

Seasonal Availability

Culinary Profile

Related Recipes

Sweet Soy-Glazed Konnyaku Kinpira

Sweet and Spicy Celery-Konnyaku Stir-Fry

Classic Tofu Dressed Vegetables (Shira-Ae)

Light Konjac Curry Rice

Kenchin-jiru (Temple Vegetable Soup)

Easy Temple Vegetable Soup

Summer Temple Tomato Soup

Konnyaku Iridaki (Braised Konjac)

Temple-Style Simmered Vegetables

Mountain Burdock with Sake Lees