Unagi – freshwater eels in Japanese cuisine

Have you ever tried "unagi"? That is the Japanese word for freshwater eel. The ingredient is deeply rooted in Japanese cuisine, and in this post we will talk a little about these eels, the dishes made with them, and the ways they are prepared. Even in anime and manga, unagi shows up often — Genta from Detective Conan, for example, is a big fan. For saltwater eels, the Japanese name is anago (穴子).

Eels are migratory fish and can live up to 30 years. Although they are called freshwater eels, they spend a great deal of time in the sea before swimming up into the rivers. Domestic production in Japan is limited, so a large share of the unagi served in restaurants is imported from countries such as China and Taiwan. Unagi is rich in protein, vitamins A and B1, and calcium — and it is especially popular in summer, when the belief is that its nutrients help fight the fatigue brought on by the heat.

For some people, eel can be a tough sell at first because of its slimy texture. The good news is that Japanese cooks know exactly how to turn that into something delicious. One of the most popular ways to serve it is grilled on a skewer and brushed with a special sauce. The flavor and texture are surprising — the flesh almost melts in the mouth, leaving a unique impression. For many Westerners, the first encounter with unagi comes through sushi.

Unagi – freshwater eels in Japanese cuisine

Different ways to eat unagi

Beyond the grilled version, often served with pickles and rice, there is unadon — a bowl of rice topped with grilled eel. Unagi is never eaten raw, because raw freshwater fish is not considered safe. In sushi, the combination of cooked unagi and cucumber is called unakyu.

There are several preparation styles. When the eel is filleted, deboned, and grilled with sauce, it is known as kabayaki. Cooked simply with salt, no sauce, it is called shirayaki. A popular variation is umaki: thin slices of unagi rolled into a Japanese omelet.

The Japanese even use the bones: in a dish called hone senbei, the long backbone of the eel is fried or grilled until crunchy, light, and salty. The grilled liver, kimoyaki, and a liver soup called kimosui are also appreciated.

There are countless other ways to enjoy unagi — as a specialty on its own or as an ingredient in other dishes. Add the regional variations on top of that, and you have a very rich culinary universe to explore.

Curiosities about Japanese eels

Unagi is often served over rice and tends to be expensive. It is not the kind of food you can eat every day on a regular budget, partly because sourcing and preparing it well is no easy task. You cannot just walk into a market, buy a fresh eel, and turn it into a great meal without the right technique.

Unagi is, above all, a summer food. There is even a fixed date in the Japanese calendar dedicated to it: Dōyo Ushi no Hi (土用丑の日). On this day, which usually falls on a Saturday, the Japanese have been eating eel since the Edo period.

In Japan, there are restaurants dedicated specifically to unagi, called unazen, where the eel is prepared fresh to order. Well-known spots in Tokyo include Ishibashi, Ikeunagi no Mise, Godaime Nodaiwa, Unagi Uomasa, and Miyoshi.

If you are in Japan, take the opportunity to try unagi for yourself. Have you already eaten it somewhere? Tell us in the comments and share this post with your friends. We also recommend reading: