Sumaru Yashiki Misegura: Step into the World of a Meiji-Era Merchant Storehouse

Tucked along the historic streets of Shiroishi, a quiet castle town in southern Miyagi Prefecture, stands a sturdy earthen storehouse known as the Sumaru Yashiki Misegura. This two-story kura-style building, constructed during the mid-Meiji period (circa 1898–1912), once served as the retail storehouse for the Watanabe family — prosperous merchants who traded in Shiroishi washi paper, dry goods, miso, soy sauce, and real estate. Registered as a national Tangible Cultural Property in September 2019, the Misegura (shop storehouse) preserves the commercial spirit and architectural craftsmanship of a bygone era, inviting visitors to experience a genuine slice of Tohoku's merchant culture.

The Watanabe Family and the "Sumaru" Name

The Watanabe family established their business during the Kyoho era (1716–1736) and grew into one of Shiroishi's wealthiest merchant households. Their enterprises spanned paper wholesaling — specializing in Shiroishi washi, one of the "Three Whites of Shiroishi" alongside umen noodles and Shiroishi kuzu starch — as well as fabric sales, miso and soy sauce brewing, and property management.

The distinctive trade name "Sumaru" derives from the family crest: three circles enclosed within an outer circle, totaling four circles (shi-maru). Over time, "shi-maru" evolved into "su-maru," and the auspicious character 壽 (kotobuki, meaning long life or celebration) was chosen to represent "su," creating the elegant trade name 壽丸 (Sumaru).

Architectural Features and Cultural Significance

The Misegura faces west toward the main street, presenting a stately facade of white and black lacquered plaster walls. Built in the dozo-zukuri (earthen storehouse) style, this two-story structure features a gabled (kirizuma) roof covered with san-gawara tiles. The eave tiles are embellished with plum blossom (umebachi) motifs, while the eyebrow-like ornamental ridges above the windows showcase the heavy, dignified plaster detailing characteristic of prosperous merchant buildings.

On the ground floor, iron lattice grilles protect the windows, and the interior preserves the original earthen-floored shop space (mise-doma). An appealing tansu-kaidan (step-chest staircase) leads to the second floor, which contains two rooms. The second-story facade is distinguished by a pair of shuttered windows fitted with traditional hinged doors (kannon-biraki), adding both practical fire protection and visual elegance.

The storehouse was registered as a national Tangible Cultural Property because of its well-balanced and imposing exterior, which plays a vital role in shaping the historic streetscape of the former castle town. Its construction quality, the use of premium materials, and the harmonious proportions together exemplify the architectural standards of wealthy Tohoku merchants during the Meiji period.

The Wider Sumaru Yashiki Estate

The Misegura is part of a larger estate that also includes the main residence (omoya), built in 1923 during the Taisho era, and a fireproof vault storehouse (kinko-gura). The main residence is equally noteworthy: a single-story wooden building with a hipped-and-gabled (irimoya) roof, it seamlessly blends Japanese and Western architectural elements. A Western-style parlor with brick foundations sits beside the formal Japanese entrance, while inside, visitors can admire Venetian glass transom windows, a nine-meter-long single-cedar eave beam, and imported plywood ceiling panels — luxurious touches that reflect the cosmopolitan tastes of Taisho-era merchants.

The estate's layout — shop storehouse facing the street, formal reception rooms, private living quarters, and a vault storehouse to the rear — follows the traditional merchant compound arrangement found among affluent families in the Edo-Tokyo cultural sphere. The completeness of this configuration is rare nationwide, making the property especially valuable as a cultural resource.

Shiroishi Washi and Living Cultural Heritage

Today, the Misegura serves as a permanent exhibition space for Shiroishi washi, the traditional handmade paper that once made the Watanabe family's fortune. Date Masamune, the legendary lord of the Sendai domain, encouraged the cultivation of kozo (paper mulberry) in the region, and by the Edo period, Shiroishi had become a major production center for high-quality washi renowned for its remarkable strength and flexibility.

Inside the storehouse, visitors can see washi artwork, akari (light sculptures) crafted from washi and natural materials like driftwood and vines, and panels depicting scenes from the Kabuki play "Shiroishi Banashi." The estate also hosts regular workshops where visitors can try their hand at making washi lanterns and uchiwa fans — experiences that bring this centuries-old craft to life.

Seasonal Events and Community Spirit

After standing vacant for some years, the estate was donated to the city of Shiroishi and is now managed by the Shiroishi Machizukuri Corporation, a community organization dedicated to revitalizing the town. Throughout the year, the spacious tatami rooms and atmospheric storehouse host a lively calendar of events: the beloved Hina Matsuri doll display stretches eight meters across the grand tatami halls each February through March; the Shiroishi Washi Akari Exhibition illuminates the rooms in August; and the Castle Town Kimono Festival brings the streets alive with colorful traditional dress each October.

The estate also functions as a gallery and rental space for art exhibitions, rakugo storytelling performances, mini concerts, flea markets, and community workshops. Even the garden — carefully tended with seasonal plantings and a tranquil pond — serves as a walking course for children from a nearby nursery school, embodying the way this historic property has been woven back into the fabric of everyday community life.

Exploring the Surroundings

Sumaru Yashiki sits conveniently between JR Shiroishi Station and Shiroishi Castle, making it an ideal stop on a walking tour of the castle town. Shiroishi Castle, fully restored in wood in 1995, is one of Japan's finest reconstructed timber castles and offers samurai armor-wearing experiences. Nearby, the former samurai residences (bukeyashiki) and traditional streetscapes preserve the atmosphere of the Edo period.

Shiroishi is also the gateway to the Zao mountain range. The Miyagi Zao Fox Village, home to around 150 free-roaming foxes, is a popular attraction roughly 20 minutes by car. For nature lovers, the emerald Okama crater lake atop Mt. Zao and the Kamasaki and Obara hot springs offer relaxation amid stunning scenery. Local culinary specialties include Shiroishi umen — short, oil-free wheat noodles invented as comfort food for a sick parent — and Shiroishi kuzu (arrowroot starch) confections.