Mito no Ume (水戸の梅)

2026年3月31日

Traditional Japanese pickled plums from Mito, known for their rich flavor and cultural significance.

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What Is Mito no Ume?

Some foods carry a place’s entire identity in a single bite. In Mito, the capital of Ibaraki Prefecture, that food is Mito no Ume (水戸の梅).

At first glance, it looks almost exactly like a real pickled plum. Unwrap the packaging and a fragrance rises immediately. It is tart, faintly sweet, and unmistakably Japanese. But this is not a pickled plum. It is a traditional confection, or wagashi, that has represented Mito for over 130 years.

The construction is precise. A smooth white bean paste (shiro an) is first wrapped in soft gyuhi, a delicate form of pounded rice cake. That parcel is then carefully enveloped in a red shiso leaf pickled in plum vinegar for over three months. The result looks rustic from the outside. Inside, the textures and flavors layer beautifully: the floral tartness of the shiso, the gentle sweetness of the bean paste, and a faint saltiness that lingers. It pairs naturally with a strong cup of green tea.

The History Behind the Confection

Traditional Japanese plum mochi from Mito no Ume, featuring sweet, chewy rice cake with ume fruit fl. — Close-up of Mito no Ume mochi, a Japanese sweet made with rice cake and ume fruit, showcasing its soft texture and rich flavor.

This is where things get a little complicated, in an interesting way.

Two confectionery families in Mito both claim to have originated Mito no Ume. Kameijirushi Confectionery says their second-generation founder created it in 1892. He found inspiration in a historical Mito Domain document. The document described a shiso-wrapped pickled plum that ninth-generation lord Tokugawa Nariaki had once ordered someone to make. Originally the founder called the sweet Hoshi no Ume, meaning “Star Plum.” The third generation later renamed it Mito no Ume.

Ikuma Sohonke, another long-established shop, traces the sweet’s origin to around 1900. Their version of the story credits a former Ibaraki governor who encouraged local food development when the Joban railway line opened. Either way, the railway matters. The arrival of train travel brought visitors from Tokyo, and visitors needed something to bring home.

By the Taisho era, Mito no Ume had reached the Imperial Court. The sweet went on to win the gold prize three times at the National Confectionery Grand Exhibition. Today, five shops hold the trademark exclusively: Kameijirushi, Ikuma Sohonke, Asakawa Confectionery, Kimuraya Honten, and Nagai Confectionery. Each shop puts its own slight variation on the recipe. Trying them side by side is worth the effort.

Fukuyui: Mito’s Own Plum Variety

For most of its history, Mito was famous for plum blossoms rather than plum fruit. The visual tradition of ume in the city was rich and well-documented. The food tradition, surprisingly, lagged behind.

That changed in 2012 when the city launched the Mito Plum Producing Region Development Project. After years of cultivation work with JA Mito, a new branded variety called Fukuyui (ふくゆい) was officially released to the market in 2017. The name sounds warm. It was chosen to suggest good fortune and connection. Large, unblemished green Fukuyui fruits are now distributed as premium fresh plums. They are also the foundation of a wave of new local food products.

The flavor profile of Fukuyui is notable. It carries stronger acidity than many commercial plum varieties. That sharpness is prized by confectioners and home cooks alike. It gives any food made with it a clear, clean plum character rather than a vague sweetness.

The Mito Ume Sweets Project

Following the release of Fukuyui, the city took an additional step. The Mito Ume Sweets Project brought together twelve local confectionery shops. Each was asked to develop original products using the new branded plum. The results span a surprisingly wide range.

Ume-infused warabi mochi (a soft bracken-starch jelly cake) uses both Fukuyui paste and plum liqueur in the batter. A dorayaki pancake sandwich uses local Mito eggs and Fukuyui bean paste filling. A galette, clearly inspired by French pastry tradition, sandwiches a richly flavored plum paste between soft layered dough. There is also an amber jelly (kohakukan) made with Fukuyui paste and umeshu, a steamed bun sealed around plum honey, and a karinto (fried dough snack) stuffed with sweet red bean and plum paste. Some of these are seasonal and only available during the plum blossom period. That scarcity makes them worth seeking out.

Umeboshi: The Salt-Only Tradition

Beyond the confectionery world, Mito has a serious pickled plum culture. Traditional umeboshi made with nothing but salt and sun-drying remain a local specialty. Producers like Nemoto Tsukemono have been making salt-only umeboshi in Mito since 1935. Some of their pickles use plums harvested directly from Kairakuen Garden. Others reconstruct historical recipes, including Shikimibai, a preparation attributed to Lord Nariaki himself. The flavor is deeply savory and sour without any added sweetness. It is a very different experience from the honey-flavored umeboshi now common in Japanese supermarkets.

Umeboshi from Mito also finds its way into everyday cooking. Pasta with Fukuyui and olive oil has become something of a modern test case for the plum’s versatility. It works surprisingly well. The acidity cuts through fat in a way that feels almost southern Italian, though the flavor is entirely Japanese.

If you are interested in other fermented and preserved foods from the region, Ibaraki’s food culture goes deep. Natto, the famous fermented soybeans, is arguably the prefecture’s best-known product. Mito ume and Mito natto together form an interesting portrait of a food culture that values fermentation, preservation, and sharp flavors above sweetness and softness.

Umeshu: Plum Liqueur and the Festival Connection

Umeshu, Japanese plum liqueur, deserves its own mention here. The Japan Umeshu Festival held annually at Tokiwa Shrine in Mito brings together over 150 varieties from breweries across the country. Sake-based, shochu-based, brandy-blended, and citrus-infused versions all appear. Tasting sessions run in timed rounds. For anyone curious about Japanese artisan drinks, this is a genuine destination event.

Local Fukuyui umeshu is now also produced in Mito itself. Kameijirushi makes a version using honey and brandy that comes in at around 12% alcohol content. It is designed to be approachable, smooth over ice or served straight.

Kairakuen and the Plum Blossom Festival

Ume cherry blossoms in Mito, Japan, showcasing vibrant pink and white flowers during spring. — Beautiful ume blossoms in Mito, Japan, with visitors enjoying the scenic cherry trees in full bloom during spring.

This food culture does not exist in isolation. It grew directly out of the landscape of Mito, and that landscape has a center.

Kairakuen Garden (偕楽園) was established in 1842 by Lord Tokugawa Nariaki. It is counted among the Three Great Gardens of Japan. Roughly 3,000 plum trees of around 100 varieties bloom across the site from late February through March. The garden was designed for public enjoyment, not private display. That philosophy persists today.

The Mito Plum Blossom Festival (水戸の梅まつり) began in 1896, timed to coincide with the opening of the Joban railway line from Tokyo. It now runs for around six weeks each spring. Evening illuminations, outdoor tea ceremonies, and traditional music performances take place throughout the season. For food-focused visitors, the festival is also the best time to find the full range of seasonal ume products. Stalls selling pickled plums, plum sweets, and plum drinks line the paths around the garden. Limited-edition confections from the Mito Ume Sweets Project appear only during this window. If you are traveling through the Kanto region in early spring, planning around this period makes obvious sense.

Where to Buy and Taste Mito no Ume

The five trademark shops are distributed across the city. Most are reachable on foot or by short bus ride from Mito Station. Kameijirushi has a main store with attached café space. Ikuma Sohonke operates close to the historic center. Kairakuen Garden’s on-site shop carries selections from several producers simultaneously. That makes it a useful one-stop option, especially for first-time visitors.

Mito Station itself also carries selections of local ume products in souvenir shops on the ground floor. Some of the Mito Ume Sweets Project products appear here as well, though availability changes seasonally.

Getting to Mito from Tokyo is straightforward. The JR Joban Limited Express from Ueno or Shinagawa takes around 70 to 90 minutes. During the plum blossom season, a temporary seasonal stop called Kairakuen-eki opens on the line, allowing direct access to the garden without a bus connection.

A Final Thought

Mito no Ume is a confection that took its inspiration from a pickled plum. A pickled plum inspired by a lord’s provisions for wartime. A garden planted to give the public something beautiful to share. Each layer connects to the next.

That kind of depth is not always easy to find in a souvenir box. In Mito, it fits inside one.