Japanese · Edo (Tokyo), Japan

Unagi Kabayaki — Eel Preparation and the Tokyo-Nagoya Divide

Unagi (Japanese freshwater eel, Anguilla japonica) prepared as kabayaki (grilled with sweet soy glaze) represents one of Japan's most technically demanding and culturally significant culinary preparations — a dish with over 400 years of documented preparation tradition and a regional style divide that reflects deeper cultural differences between eastern (Kanto) and western (Kansai/Nagoya) Japan. The Kanto (Tokyo) style involves splitting the eel from the back, removing the spine, cutting into portions, skewering, grilling over charcoal briefly, then steaming in a covered vessel for 15–20 minutes (which renders the subcutaneous fat and produces the characteristically tender, falling-apart texture of Edo-style unagi), then a final glaze-and-grill pass with tare. The Kansai style (Kyoto, Osaka, Nagoya) splits from the belly, skips the steaming step, and grills exclusively — producing a firmer, more charred result with more pronounced bitterness from the caramelised tare. The steaming step in Kanto style is the defining technical intervention: it renders fat while preserving moisture, creating a texture impossible to achieve by grilling alone. The tare for unagi is a living sauce — classic unagi shops maintain tare pots continuously, adding fresh sauce while cooking eel baste the sauce with their fat, developing complexity over decades. Wild eel (tennen unagi) is now extremely scarce and extremely expensive; virtually all commercial unagi is farmed, primarily in Hamamatsu (Shizuoka) and Kagoshima.

ServesFour portions

Sourced1of 8 in BC

Cook

The Market List

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unagi kabayaki (pre-prepared, quality supplier)

fully defrosted if previously frozen; Hamamatsu or Kagoshima farmed preferred

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2 tbsp

sake

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2 tbsp

water

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For the tare

120 ml

soy sauce

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120 ml

mirin

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40 g

sugar

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For the unadon

600 g

short-grain Japanese rice

freshly cooked, loose and hot

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1 tsp

sansho pepper (kinome)

to finish

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The Method

Combine soy sauce, mirin, and sugar in a small saucepan over medium heat. Stir until the sugar dissolves, then reduce until the tare coats the back of a spoon and holds a line drawn through it without running. Remove from heat. The tare must be thick enough to adhere and caramelise on contact with heat, not thin enough to run off.

Place the pre-prepared kabayaki portions skin-side down in a covered pan. Add the sake and water. Cover tightly and warm over low heat for 15–20 minutes. This is the Kanto steaming step — it renders the subcutaneous fat while preserving moisture, producing the characteristically tender, falling-apart Edo texture. Under-steaming leaves fat unrendered; over-steaming produces a mushy result. The eel is ready when it yields at the thickest point under light finger pressure and the flesh has relaxed visibly.

Transfer the steamed eel portions to a rack set over a tray. Brush a first coat of tare over the flesh side. Place under a high broiler or apply a kitchen torch, working steadily across the surface, until the tare caramelises to a lacquered sheen. The charcoal heat — or its domestic equivalent — must be high enough to caramelise the tare without burning it.

Brush a second coat of tare over the caramelised surface and return briefly to the broiler or torch. Repeat for a third application. Each pass builds the sticky, lacquered glaze characteristic of kabayaki. The surface is done when it is deeply glossed, faintly firm to the touch, and carries a clean charred edge at the thinnest points.

Divide freshly cooked short-grain rice between four hot bowls or lacquer boxes (jubako). The rice must be loose and hot. Lay the glazed eel portions on top, drizzle with additional tare, and finish with a pinch of sansho pepper (kinome) per portion to provide aromatic contrast to the richness. Serve immediately.

III

Quality Hierarchy

Reserve — Wild eel (tennen unagi): now extremely scarce and extremely expensive; effectively unobtainable outside specialist Japanese suppliers. Tare maintained continuously in a living pot over years or decades, as in historic Edo unagi shops.

Estate — Farmed unagi from Hamamatsu (Shizuoka) or Kagoshima — the named production centres of Japan's premium farmed eel. Pre-prepared kabayaki sourced directly from a specialist Japanese fishmonger or importer.

Market — Quality pre-prepared kabayaki from a reputable Japanese grocery, fully defrosted and handled correctly before reheating. Fresh tare made to proportion for each preparation.

House — Vacuum-packed kabayaki of commercial grade, reheated with sake and water as described, finished with a bottled tare adjusted with fresh mirin and sugar. Serviceable for the unadon format.

Sensory Tests

◇Touch. After steaming, the eel yields at its thickest point under light finger pressure and the flesh has visibly relaxed — fat rendered, moisture retained.

◇Sight. Tare, when reduced, holds a clean line drawn through it on the back of a spoon without running.

◇Sight. After each glaze-and-grill pass, the surface carries a deep, even lacquer; faint char at the thinnest edges confirms sufficient caramelisation heat.

◇Smell. The final broiler pass produces a clean, sweet-smoke caramel scent; any acrid note indicates the tare is beginning to burn and heat must be reduced immediately.

◇Where it lives or dies. The steaming step is the defining technical intervention of Kanto-style kabayaki: it alone renders the subcutaneous fat while preserving moisture, and no amount of extended grilling can replicate its result.

V · Cross-Cuisine Parallels

Anguille au Vert (Belgian-French): stewed eel in green herbs and butter — the Western tradition that directly contrasts kabayaki's dry-heat, sweet-glaze approach, yet reflects the same recognition that eel's fatty richness demands a specific and deliberate technique. Shanghainese braised river eel: shares kabayaki's sweet-soy caramelised logic, applying the same East Asian sweet-savoury framework to eel as a premium ingredient, though without kabayaki's defining charcoal-grill finish.

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VII · Origin & Lineage

Kabayaki preparation is documented from the early Edo period (17th century) in what is now Tokyo. The Kanto–Kansai stylistic divide — back-split with steaming versus belly-split with grilling only — was established within the same era and reflects a broader cultural divergence between eastern and western Japan. The preparation tradition spans more than 400 years. Source: The Japanese Culinary Academy's Complete Japanese Cuisine Series.

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