Image: Wikimedia Commons
Kozuyu is a soup served at celebratory feasts in the Aizu region, made with an elegant broth from dried scallops (dried adductor muscle) and an odd number of ingredients — taro, carrot, shiitake mushroom, wood ear mushroom, shirataki noodles, and bean-flour fu (wheat gluten) — simmered together and lightly seasoned. It is typically served in shallow Aizu-nuri lacquerware bowls called 'teshiozara,' where the glossy vermilion of the lacquer complements the colors of the soup. As an essential dish for hospitality on celebratory occasions such as New Year, weddings, and memorial services, it has been passed down for generations in Aizu households. Using dried scallops — a precious seafood ingredient — for the broth was itself considered a luxury in landlocked Aizu, and the dish came to be regarded as the ultimate way to entertain guests. A distinctive custom allows guests to have as many refills as they like, making Kozuyu more than just a dish — it embodies the region's culture of hospitality and celebration. Each household has its own subtle variations in the mix and cut of ingredients, handed down as a family recipe.
Origin
Kozuyu is said to originate from a dish called 'ju' that Matsudaira Katataka, the 8th lord of the Aizu domain, encountered during his sankin-kotai (alternate attendance) travels in the late Edo period. Developed as a hospitality dish for the samurai class, it was originally served in two separate bowls, known as 'ichi no ju' and 'ni no ju,' or 'ichi no tsuyu' and 'ni no tsuyu.' The luxury of using broth from seafood such as dried scallops, difficult to obtain in landlocked Aizu, established the dish as a special feast for celebratory occasions within the domain.
History
Kozuyu spread as a samurai dish of the Aizu domain from the late Edo period into the Meiji era, and later became part of celebratory meals among common people as well. Around the late 1980s, the practice of serving the dish in two separate bowls was consolidated into a single bowl, giving rise to the form of Kozuyu known today. Although Aizu has endured repeated wars and disasters, Kozuyu has continued to be made for every life-cycle ceremony, and it remains an essential dish at New Year gatherings, weddings, and memorial services in the Aizu region across generations.
Features
Its defining feature is a broth made by soaking dried scallops overnight, seasoned lightly with soy sauce, sake, and salt. By custom, the ingredients are kept to an odd number — seven or nine — for good luck, with the exact mix varying slightly by household. Served in shallow Aizu-nuri lacquerware bowls, it is a dish that lets diners enjoy both the food and the vessel together, reflecting Aizu's lacquerware culture. At banquets, it is prepared in a large pot so that guests can have as many refills as they like, another hallmark of Aizu hospitality.
Main Ingredients
Food Culture
Kozuyu has been passed down as a dish of hospitality, prepared in large pots for celebratory occasions such as New Year, weddings, and memorial services and served to guests. The more refills a guest has, the more it is said to please the host, keeping alive a culture of connection built around food. It is often served near the end of a banquet, and the custom of pairing it with Aizu-nuri lacquerware is itself a point of local pride.
How It Differs from Home Cooking
At home, the dried-ingredient broth is sometimes simplified, but at restaurants specializing in local cuisine, dried scallops are carefully soaked overnight and the dish is served in Aizu-nuri lacquerware, preserving the traditional method in both ingredients and presentation. Many restaurants take extra care in preparing the ingredients, producing a more refined finish than the home-cooked version.
Famous Shops
會津郷土食と桜鍋 鶴我 会津本店
福島県会津若松市駅前町6-12
A restaurant specializing in Aizu local cuisine and sakura-nabe (horse meat hot pot). Kozuyu costs around 1,100 yen and can also be enjoyed as part of the Aizu kaiseki course.
View details →会津居酒屋 城下町料理 籠太
福島県会津若松市栄町8-49
A stylish izakaya set in a former ryotei (traditional restaurant). Kozuyu is easy to order at around 460 yen, and other local dishes such as miso-kanpura (potatoes simmered in sweet miso) are also available.
View details →FAQ
Q. What is the origin of the name 'Kozuyu'?
A. The leading theory is that 'kojū no tsuyu' (broth of the small tiered boxes) was shortened and altered to become 'Kozuyu.' The dish's former custom of being served in two tiered boxes, 'ichi no ju' and 'ni no ju,' is also thought to be connected to the origin of the name.