Kujirajiru regional whale soup across Japan's prefectures

Kujirajiru (鯨汁) is a Japanese regional soup in which whale meat is the defining ingredient. It was once a popular dish throughout Japan and is treated as a winter seasonal word in haikai; local forms were shaped by which parts were available and by the preservation methods used where freezing was not possible.

Whale meat and preservation

The absence of long-term freezing in premodern Japan produced clear regional patterns in the cuts and treatment of whale used for kujirajiru. In regions from Kishu to Kyushu, where whales could be taken locally, fresh raw whale meat was used in clear broths (sumashi-jiru). In Kyoto the common practice was to use skin-on whale preserved by pickling in sake or salting. North of Kanto, cooks tended to use salt-cured meat with the black skin and a fatty layer intact. Across mountain and inland areas, salt-cured, skin-on whale fat became a valued, long-keeping animal protein.

Edo-era customs and price

In Edo there was a specific custom tied to year-end cleaning: after the soot-clearing ritual held on the old lunar calendar date of December 13, kujirajiru was served to those taking part. Celebratory lifting of people was also performed on that occasion, and contemporary verse recorded the scale of consumption — a senryu remarked that on the 13th the city ate the equivalent of five or six whales. A single bowl of kujirajiru in Edo was said to cost 16 mon, the same price as a bowl of soba, marking it as a working‑class everyday dish as well as a festival food.

Hokkaido: southern region and New Year pots

In southern Hokkaido (the dounan region) kujirajiru — also called kujina-jiru locally — became closely associated with the New Year. Salt‑cured whale fat is simmered in a large pot with overwintering vegetables and salt‑preserved wild mountain plants; families would eat from that pot across the first three days of the year. Because the stew is repeatedly reheated, cooks favour vegetables that keep their shape. Soy‑based seasoning is the most common approach in the region. The practice also has links to coastal fishing culture: in the late Edo to Meiji periods, herring fishing was prosperous and whales that drove herring toward shore were revered; kujirajiru at New Year carried wishes for a bountiful herring season and for “big catches” symbolised by the large whale.

Aomori and Hachinohe: whaling base and “white meat”

In Aomori prefecture kujirajiru is eaten around the Shimokita Peninsula and in Hachinohe, where a whaling base fostered an extensive whale food culture. Local cooks use the portion known as the “white meat” — the back’s skin-on section — and chunks of fat. Those fatty pieces are briefly blanched or dry‑roasted to shed excess fat, then simmered with daikon, carrot, burdock and potato into a robust, vegetable-rich soup. For New Year the soup may be turned into a kujira‑zoni by adding grilled square mochi, and, as elsewhere, eating whale at year end is linked to auspicious hopes of large catches and big fortunes. Commercial whale hunting in Japan was prohibited in 1988 and did not resume until 2019; in Aomori this contributed to a decline in whale cuisine, and younger generations in Hachinohe are less familiar with kujirajiru. Once common as an everyday dish, its household preparation outside of the New Year has become rare where access to whale meat declined.

Yamagata, Niigata and Fukushima: inland and coastal variants

Yamagata prefecture uses a salt‑cured, skin‑on whale fat known locally as salt kujira; throughout the prefecture a salt kujira soup is eaten, often flavoured with miso to counteract any strong odour, though salt or soy seasoning are also used. Salt‑cured whale provided a preservable animal protein much appreciated in mountain districts, and summer dishes combining new potatoes, eggplant and green beans with salt kujira were a way to store animal fat against hotter months. In some localities in Yamagata the dish appears under different names: in the Murayama area it is called iruka‑jiru, and in the Mogami area hand‑torn mountain greens (mizu) give rise to names such as mongiri mizu jiru.

Niigata’s kujirajiru is found in both the Chuetsu and Kaetsu regions. Salted whale from western Japan reached Niigata via the kitamaebune coastal trading routes; because whale fat contains a relatively high share of unsaturated fatty acids, it was eaten in Niigata as a stamina food in midsummer. A characteristic local ingredient is round eggplant (maru‑nasu) and the dish is most often miso‑based, though soy seasoning occurs. Salted whale’s durability made it suitable for transport inland to mountain villages; around Niigata City eggplant is used more heavily, in Chuetsu yuugao is common, and in parts of lower Niigata spring versions use the mountain vegetable urui. For cultural preservation the dish has been included on some school lunch menus and is also offered by restaurants and izakaya in the region.

In Aizu, Fukushima, salt‑cured whale meat arrived from the Japan Sea side and became a storage‑stable ingredient after the Edo period. Following the autumn rice harvest, when a sweet rice cake called shingorou is made, families historically also ate kujirajiru to supply fat and salt after harvest; it has also been regarded as a countermeasure against summer fatigue because of its salt and fat content.

Cooking methods and seasonings across regions

Across prefectures kujirajiru takes a few recurring forms: clear sumashi broths where fresh meat was available; miso‑based stews to mask stronger aromas; and soy‑based pots in parts of Hokkaido. Techniques include short blanching or dry roasting of fatty pieces to render off excess oil before simmering, and the use of hardy root vegetables and potatoes in pots intended to be reheated. At New Year some communities add grilled mochi to create a zoni‑style variant. Preservation in salt or in sake was a common Kyoto practice, while salt curing predominated where long transport or mountain storage was required.

FAQ

What is Kujirajiru?

Kujirajiru is a Japanese regional soup that uses whale meat as its primary ingredient.

When was kujirajiru served in Edo?

In Edo tradition it was served after the soot‑clearing on the old lunar calendar date of December 13 and a bowl cost about 16 mon, the same price as a bowl of soba.

Where is kujirajiru an essential New Year dish?

In southern Hokkaido (the dounan region) kujirajiru, called kujina‑jiru locally, is regarded as indispensable at New Year.

Why did kujirajiru traditions decline in some northern communities?

Commercial whaling in Japan was prohibited in 1988 and did not resume until 2019, which reduced access to whale meat and led to a waning of whale‑based food culture among younger generations in places such as Hachinohe.