Daikon-zushi is a traditional fermented food from Ishikawa Prefecture, particularly associated with the Kaga region around Kanazawa. It is made by fermenting daikon radish with dried herring, rice malt, and amazake, a naturally sweet drink made from rice and koji. The result is a distinctive regional delicacy that combines the crisp texture of radish with the savory richness of fish and the gentle sweetness and acidity created by fermentation.
Despite its name, Daikon-zushi is not sushi made with vinegared rice in the familiar modern style. Instead, it belongs to the tradition of fermented fish and vegetable dishes that have been preserved and enjoyed in Japan for centuries. Alongside Kabura-zushi, made with turnip and yellowtail, it is one of Ishikawa’s best-known traditional fermented foods.
Daikon-zushi developed in connection with the maritime trade routes of the Sea of Japan. During the Edo period, merchant ships known as Kitamae-bune transported rice, seafood, and other goods between Hokkaido, western Japan, and ports along the coast. Noto and other coastal communities benefited from this trade, and dried herring became widely available.
Dried herring, known as migaki-nishin, was prepared by removing the internal organs and roe before drying the fish. It could be stored and transported more easily than fresh seafood, making it a practical ingredient for households throughout the region. Combined with locally grown daikon and rice-based fermentation ingredients, it became the foundation of Daikon-zushi.
Historical records indicate that a similar herring sushi was already being exchanged in the Tsurugi area near Kanazawa in the early nineteenth century. The dish became established as a household food, passed down from one generation to the next and prepared especially during the winter season.
The main ingredients are daikon radish, dried herring, rice malt, and amazake. Carrots are often added for color, while kombu seaweed, yuzu peel, and red chili pepper may be included to create additional layers of aroma and flavor.
In Kanazawa, daikon is commonly cut into thick strips or baton-shaped pieces and fermented with small pieces of herring and other ingredients. In colder, snowier areas, rice malt may be used instead of amazake because the fermentation can be managed differently under local conditions.
Gensuke daikon, a traditional Kaga vegetable known for its tender flesh and natural sweetness, is particularly well suited to this dish. When fermented with the fish, the radish retains a pleasant crunch while absorbing the savory seasoning.
Preparing Daikon-zushi begins with salting the cut radish and allowing it to rest under a weight for several days. The dried herring is soaked to soften it, cleaned, and cut into pieces. The radish and fish are then layered or mixed with rice malt, amazake, and other seasonings.
The mixture is placed in a container and left to ferment in a cool environment. During this period, the flavors gradually develop, creating a balance of sweetness, saltiness, and mild acidity. The fermentation time varies according to the recipe, temperature, and regional tradition.
Daikon-zushi is usually eaten with the rice malt still clinging to the ingredients. The herring becomes tender during preparation, and the finished dish has a characteristic fermented aroma and a satisfying contrast between the fish and crisp radish.
Daikon-zushi is traditionally associated with winter, when daikon is abundant and fermented foods are especially welcome at the table. Unlike the more luxurious Kabura-zushi, which is often prepared for New Year’s celebrations and given as a seasonal gift, Daikon-zushi has long been a more accessible food for everyday family meals.
Before the Second World War, many households prepared their own Daikon-zushi much as they made pickles. Although fewer families make it at home today, the tradition continues through local food producers, delicatessen shops, supermarkets, and cooking classes.
Daikon-zushi is generally served in small portions as a side dish with rice or as an accompaniment to Japanese sake. Its fermented sweetness and savory fish flavor can be enjoyed on their own, while the crisp radish provides a refreshing texture.
The flavor may be unfamiliar to visitors who have never tried Japanese fermented foods, but it offers a valuable introduction to the traditional preservation techniques of Ishikawa. Each producer and household has its own recipe, so the balance of sweetness, acidity, and saltiness can vary.
Visitors to Kanazawa and the surrounding areas can look for Daikon-zushi at traditional food shops, local supermarkets, delicatessens, and stores specializing in regional pickles and fermented foods. It is often sold in packaged portions, making it easy to sample alongside other local specialties.
For travelers interested in Ishikawa’s culinary heritage, Daikon-zushi offers a taste of the region’s history, from the trading routes of the Sea of Japan to the seasonal rhythms of traditional household cooking.