Unadon (Unagi Donburi) 鰻丼

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  • Have fun making one of Japanese favorites, Unadon (grilled eel rice bowl), in your own kitchen. Sweet caramelized homemade unagi sauce drizzled over perfectly grilled unagi and steamed rice, this recipe will make any Japanese food enthusiasts mouth water.

    A classic Japanese dish Unadon in a Japanese lacquer bowl containing steamed rice and grilled eel fillet caramelized in sweet soy-based sauce and Japanese tea cup on the wooden table.

    Unagi sushi are pretty popular and available at most sushi restaurants, but the satisfaction of eating the perfectly grilled unagi on top of warm rice is completely different and can not be compared. This classic dish is called Unadon (鰻丼).  The aroma of the sweet caramelized unagi sauce alone is enough to make my mouth water. 

    A classic Japanese dish Unadon in a Japanese lacquer bowl containing steamed rice and grilled eel fillet caramelized in sweet soy-based sauce and chopstick on wooden table.

    What’s Unadon?

    Unadon is a classic Japanese dish that consists of steamed rice topped with grilled eel fillets that are glazed with a sweetened soy-based sauce (called tare) and caramelized, preferably over charcoal fire.  Unadon is a short word for Unagi (eel) Donburi (rice bowl dish).

    For those of you who are not familiar with Japanese cuisine, you might think we are barbaric eaters!  Well, to be honest with you, I grew up eating eels without thinking they were strange food.  When unagi was served, it always looked like a typical fish fillet to me. Don’t you agree by looking at the picture above?

    I was surprised when I found out what eels actually looked like in the aquarium at a young age.  It was hard to connect the dots between the snake looking fish in the water and “the fish” I was eating.  For better or for worse, that experience did not stop me from enjoying unagi all these years.

    Rich in vitamins A and E, and Omega-3 fatty acids, the great nutritious benefits of eel is another reason why Japanese people enjoy eating unagi. From Edo Period (1600-1850), we have a tradition of eating unagi on a particular mid-summer day called doyō-no ushi-no-hi (土用の丑の日) in order to gain stamina from the hot summer heat.

    A classic Japanese dish Unadon in a Japanese lacquer bowl containing steamed rice and grilled eel fillet caramelized in sweet soy-based sauce on wooden table.

    How Unagi is Prepared

    Most Japanese homecooks don’t buy a live eel to cook at home.  We buy pre-grilled unagi or the ones that are grilled and vacuum-packed.

    My local Japanese supermarket sells imported unagi from Japan.  They are usually cost between $18-$25 USD each (Frozen unagi from other countries are usually around $9 USD each.).  If you are able to find Japanese unagi in your local market, you are in for a real treat!  The unagi can be kept frozen until you’re ready to enjoy since they come in vacuum-sealed package.  This unagi is from Kagoshima, Japan.

    Packaged cooked Unagi on the table.

     

    The style of cooking unagi is called kabayaki (蒲焼), similar to Teriyaki.  It’s a very typical way to prepare unagi and other fish that can be prepared the same way as well.  Basically the fish is split down the back (or belly), gutted and boned, butterflied, cut into square fillets, skewered, and dipped in a sweet soy sauce based sauce before broiled on a charcoal grill.

    In the Tokyo region, the skewered eel is first broiled without the sauce, and we call it Shirayaki (白焼き).  Then the unagi are steamed, before being dipped in the sauce and grilled again.

    When unagi is served in a big rice bowl, it’s called Unadon (鰻丼) and when it’s served in a fancy square lacquer box, it is called Unaju (鰻重) because the tiered lacquered boxes are called jubako (重箱).

    Unaju, cup of soup and pickles in a small dish on the table.

    Unagi Sauce (unagi no tare) for Unadon

    Today I will share how to prepare Unadon with a homemade unagi sauce. You can buy premade Unagi Sauce from a Japanese (or Asian) market, but you can easily make it at home.

    With just 4 ingredients, you can quickly whip up a sweet caramelized sauce to flavor the grilled eel.  If I have any leftover unagi sauce, I’ll also use it to dress Yaki Onigiri (Grilled Rice Balls). For the minimal effort it takes to make delicious unadon, it’s truly worth it.

    A classic Japanese dish Unadon in a Japanese lacquer bowl containing steamed rice and grilled eel fillet caramelized in sweet soy-based sauce and tea cup on the wooden table.

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    5 from 3 votes
    A classic Japanese dish Unadon in a Japanese lacquer bowl containing steamed rice, grilled eel fillet caramelized in sweet soy-based sauce.
    Unadon (Unagi Don)
    Prep Time
    10 mins
    Cook Time
    10 mins
    Total Time
    20 mins
     
    Course: Main Course
    Servings: 4 servings
    Ingredients
    Unagi Sauce (Unagi Tare): See Notes
    • ¼ cup soy sauce (Use GF soy sauce for Gluten Free)
    • ¼ cup mirin
    • Tbsp sugar
    • Tbsp sake
    Instructions
    1. Start making Unagi Sauce. Combine mirin and sake in a small saucepan and bring it to a boil to evaporate alcohol.
      Unagi Don 1
    2. Add sugar and stir until sugar is completely dissolved. Then add soy sauce and bring it to a boil. Then reduce heat and continue cooking on simmer for 10 minutes, or until thicken. Turn off the heat to cool it down.
      Unagi Don 2
    3. Preheat your oven to broil (high/550F (290C) for 3 minutes. Meanwhile cut Unagi in half (or maybe third) to fit inside your serving bowls. Line the baking sheet with aluminum foil and brush oil lightly (I use spray oil). Place unagi on top.
      Unagi Don 3
    4. Put the baking sheet in the MIDDLE rack of your oven, and broil on high for 5-7 minutes (no need to flip).
    5. After 7 minutes or so, take it out and brush the Unagi Sauce over.
      Unagi Don 4
    6. Continue to broil for another 30 seconds to 60 seconds until you see bubbles on top of Unagi.
      Unagi Don 5
    7. Serve rice in a bowl and pour or brush Unagi Sauce on the rice. Serve Unagi on top of rice and pour/brush more Unagi Sauce. Serve immediately. You can also sprinkle some Sansho.
      Unagi Don 6
    Recipe Notes

    Unagi Sauce (Unagi Tare): I updated the sauce recipe to 1/3 of my original recipe for just 2 fillets (However, the step-by-step pictures above show my original recipe portion).

    I usually make unagi sauce with the following recipe and use it whenever I need instead of making it in small portion each time. You can store the sauce in the refrigerator.

    My original recipe:
    3/4 cup soy sauce
    3/4 cup mirin
    1/2 cup (4.4oz/125g) sugar
    1/4 cup sake.

    Reduce the sauce for 20 minutes, or until thicken (instead of 10 mins as written above).

    For re-heating unagi, you can use a frying pan, but I recommend you to use the oven broiler. If you don't have an oven, you can use an oven toaster as well.

    Recipe by Namiko Chen of Just One Cookbook. All images and content on this site are copyright protected. Please do not use my images without my permission. If you’d like to share this recipe on your site, please re-write the recipe and link to this post as the original source. Thank you.

    Update: The post was originally published on May 31, 2012.  The recipe was updated in July 2012.  The images and content have been updated in November 2017.

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