Unagi—freshwater eel glazed with a sweet soy-based tare sauce and grilled—is one of Japan’s classic summer dishes. It is especially popular around Doyo no Ushi no Hi, the traditional “Day of the Ox” in midsummer, when many people eat eel to restore their energy. The smoky aroma, caramelized sauce and hot rice make it an easy dish for first-time visitors to enjoy.
History and cultural background
Eel has been eaten in Japan since ancient times, but the modern kabayaki style became established during the Edo period. The eel is opened, deboned, skewered and repeatedly grilled and brushed with tare. Specialist eel restaurants appeared in Edo, present-day Tokyo, during the nineteenth century, helping turn unagi rice into a widely recognized urban dish.
Unagi is rich in protein and vitamins, which is one reason it became associated with maintaining stamina during Japan’s hot, humid summers. Demand can be particularly high around Doyo no Ushi no Hi, so reservations are advisable at well-known restaurants.
Main types of unagi rice
Unaju is served in a rectangular lacquered box and is generally positioned as the more formal or premium choice. A set often includes clear soup and pickles.
Unadon is served over rice in a bowl. It offers the same basic combination in a more casual format and is often less expensive.
Kanto style and Kansai style differ in preparation. In Kanto, the eel is usually split from the back, briefly grilled, steamed and grilled again, producing a soft texture. In Kansai, it is commonly split from the belly and grilled without steaming, giving the skin a crisper finish and a stronger roasted aroma.
How to enjoy it
Start with a bite without adding anything so you can taste the tare and charcoal aroma. Next, add a small amount of sansho pepper; its citrus-like fragrance balances the rich, sweet sauce. Clear soup and pickles refresh the palate between bites. At a hitsumabushi restaurant in Nagoya, the eel is cut into smaller pieces and eaten in several stages: plain, with condiments, and finally with broth poured over the rice.
Notable areas and restaurants
Lake Hamana, Shizuoka is one of Japan’s best-known eel-producing areas and has many specialist restaurants.
Maekawa, Asakusa, Tokyo is a long-established restaurant dating from 1835, near the Sumida River.
Ise-sada, Nihonbashi, Tokyo is known for traditional Kanto-style kabayaki.
Ise-ri, Azabu-juban, Tokyo is an old restaurant associated with a sauce recipe maintained over generations.
Atsuta Horaiken, Nagoya is closely associated with hitsumabushi, Nagoya’s famous chopped-eel rice dish.
Izumoya, Osaka represents the more robust Kansai grilling style.
Giwo-n Uokeya U, Kyoto offers a refined eel experience in the atmosphere of a traditional Gion townhouse.
Yoshizuka Unagiya, Fukuoka is a historic Hakata restaurant founded in 1873.
Restaurant names, branches and opening status can change. Check the official website or ask your hotel to confirm before making a special journey.
Budget and ordering tips
Seasonal eel dishes at casual chains may cost about ¥1,000–¥2,000. A standard specialist restaurant usually costs around ¥3,000–¥5,000 per person, while premium courses at historic restaurants can exceed ¥5,000–¥10,000. Prices depend on eel size and grade. Some restaurants require each guest to order one main dish, and preparation may take 20–40 minutes because the eel is grilled after ordering.