Unadon is a classic Japanese rice bowl that brings together tender grilled eel, hot steamed rice, and a glossy sweet-savory sauce. The name comes from “unagi” for freshwater eel and “donburi” for a rice bowl.

Although it looks like a restaurant-style dish, the home version can be surprisingly straightforward when using prepared grilled eel fillets. This recipe keeps the process simple while preserving the rich flavor and appealing texture that make Unadon so popular.

Ingredients

Preparation time: 5 minutes

Cooking time: 10–15 minutes

Total time: About 30 minutes

Serves: 4

2 freshwater eel fillets, prepared and defrosted

4 cups steamed Japanese short-grain rice

1/4 cup soy sauce

1/4 cup water

2 1/2 tablespoons sugar

1 teaspoon grated ginger, optional

1 teaspoon cooking oil, for the baking sheet

Japanese sansho pepper, optional

Instructions

1. Prepare the sauce by combining the soy sauce, water, and sugar in a small saucepan. Stir over medium heat until the sugar dissolves.

2. Bring the mixture to a gentle simmer, then lower the heat. Continue cooking until the sauce becomes slightly thicker and more concentrated, about 10–15 minutes. Stir occasionally and watch carefully so it does not reduce too far.

3. Remove the sauce from the heat and let it cool slightly. It will become thicker as it cools. If it becomes too thick, stir in a small amount of water.

4. Cut each eel fillet into two or three pieces, depending on the size of the bowls.

5. For broiling, preheat the broiler on high. Line a baking sheet with foil and lightly coat it with cooking oil.

6. Place the eel pieces skin-side down on the prepared sheet. Broil for about 5–7 minutes, or until the surface becomes lightly blistered.

7. Brush the eel with the prepared sauce, then return it to the broiler for another 30–60 seconds, until the sauce begins bubbling. Watch closely because the glaze can darken quickly.

8. Spoon hot steamed rice into individual bowls.

9. Brush or drizzle some of the remaining sauce over the rice.

10. Place the grilled eel on top of each serving and add another light coating of sauce.

11. Finish with a small sprinkle of Japanese sansho pepper if desired, then serve immediately. The original recipe also suggests serving 12. Unadon with simple Japanese side dishes such as miso soup, pickles, or vegetables.

Tips for Better Results

The most important detail is controlling the sauce. It should be thick enough to coat the eel and rice without becoming sticky or overly concentrated. Reducing it gradually gives better control than cooking it aggressively.

The eel also does not need to be flipped during broiling. The recipe recommends heating it on one side and adding the sauce near the end. This helps warm the fillet while giving the glaze a chance to bubble and develop a richer surface.

If a broiler is unavailable, the original recipe provides oven and pan-heating alternatives. Baking at 425°F (218°C) takes around 10–12 minutes, followed by a short second heating after the sauce is added.

How to Serve Unadon

Unadon is best served immediately while the rice is hot and the eel is freshly glazed. A simple bowl is all that is needed, although a traditional Japanese lacquered box can also be used for a more formal presentation.

The sauce can be prepared ahead and stored separately, making future servings easier. Leftover eel can also be refrigerated in an airtight container for up to three days, while the sauce can be kept refrigerated for longer when stored properly.

Unadon shows how a few carefully prepared components can create a satisfying meal. Tender grilled eel, steaming rice, and a sweet-savory glaze provide plenty of flavor without requiring a complicated cooking process. For anyone trying Japanese home cooking for the first time, this rice bowl is a practical place to start. Using prepared eel keeps the preparation manageable, while the homemade sauce gives the dish a fresh, personal touch.