Doyo No Ushi No Hi – Unagi Day!

doyo no ushi no hinew unadon

Doyo No Ushi No Hi (土用の丑の日) is a day in mid July – this year falling on July 29 – dedicated to eating unagi (うなぎ), or eel. In Japanese, doyo (土用) is a word given to the 18-19 day period preceding the change of seasons; ushi (丑) is the ox zodiac sign in Chinese astrology. Ushi no hi (丑の日) means, literally, day of the ox. The day of the ox falls within this doyo period, which results in the Doyo No Ushi No Hi, literally translated to “day of the ox of the seasonal change period.”

The Doyo No Ushi No Hi tradition of eating unagi started in the Edo period. During this time there was (and still is, in fact) a long-held belief that on Doyo No Ushi No Hi eating food beginning with う, or u, would bring relief from the summer’s oppressive heat and humidity. It’s said that during the Edo period, there was a man who owned an eel restaurant who had fallen on hard times because he was having trouble selling his unagi in the heat of the summer. The restaurant owner was a friend of Hiraga Gennai, a well-known author, painter, physician and pharmacologist of the time. When the restaurant owner went to Gennai asking for help, Gennai pointed out that since unagi started with the ‘u’ character, the restaurant owner should advertise with that in mind. Gennai drew a sign for the restaurant stating that since Doyo No Ushi No Hi was nearing, that it was the best time to eat unagi.


Unagi isn’t eaten solely because of the belief that it’s good to eat ‘u’ foods on Doyo No Ushi No Hi, however; unagi actually has the nutritional benefits to back its claim. During the summer months, it’s often too hot for our bodies to keep up energy, so our bodies are often too tired to want to eat a full, nutritional meal, so we eat less food than we would during cooler months. Unagi is a food that’s jam-packed with protein, calcium, and with many vitamins, (A, B1, B2, D, and especially E) many of them helpful in keeping up stamina.

In the Kanto region of Japan, steamed unagi is popular while in Kansai, the most popular unagi is grilled. The unagi is then covered with a special, sweet sauce, sprinkled with sansho pepper and served over a bowl of rice, called unadon (鰻丼). Another popular way to serve unagi is as kabayaki (蒲焼き), which is simply grilled unagi served on skewers.

At Asahi, you can buy frozen, pre-cooked unagi. This unagi simply needs to be defrosted and is ready to re-steam or put on the grill. Pre-made unagi sauce is also available, however, if you wish to make your own sauce at home, you can also purchase the ingredients (soy sauce, mirin, sugar, and cooking sake.)

Are you going to eat unagi this Doyo No Ushi No Hi, or are you going to try to add more ‘u’ foods, such as udon or umeboshi plums, to your diet that day in order to fight the summer heat?


Leave a Comment

    1. Hi!

      Making grilled eel is actually really simple with the amount of pre-made materials that you can find in stores. It’s most common to just buy some pre-grilled, vacuum-packed eel and some pre-made eel sauce then some sansho pepper to sprinkle on top. If you’re in the area, Asahi carries everything you need for a great unagi don.

      If you’re not able to find everything, or if you just want to try your hand at making everything from scratch, then you just need to grill your eel and baste it with a boiled mixture of cooking sake (3 tbsp), mirin (2 tbsp), soy sauce (2 tbsp), sugar (4 tbsp), and half a cup of bonito stock (measurements given are for 1 lb. of eel.)

      As for squid, it’s common to find that with a ginger sauce. You can make it similarly to the eel, but with soy sauce (3 tbsp), mirin (2 tbsp), vegetable oil (2 tbsp) and grated ginger (2 tbsp). Marinade your squid steak in the mixture for a little bit, then just cook it stir-fry style, adding the rest of your marinade near the end. Watch out, though, as squid can get rubbery if you cook it for too long. You can also use a teriyaki sauce or even the same kind of sauce recipe I listed for the eel with your squid!

      Thank you for reading and the message! Hope your eel rice bowl (unadon (うな丼) in Japanese) turns out great!

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s