There have been storehouses in Japan for as long as people have needed to store things. Pieces of kura have turned up in archaeological sites dating as far back as the Yayoi Period (about 300 B.C.-A.D. 300), and there are descriptions of storehouses in written records from the 13th century. The structures varied according to what needed to be stored as well as the building materials available. But what you’re asking about, and what most people today think of as kura, are relatively modern clay-and-wood constructions called dozō (earthen storehouse).
Any dozō still standing in Tokyo was probably built no earlier than the Meiji Era (1868-1912), according to Toru Kanai of the Japan Minka Revival Association (JMRA), which strives to preserve traditional buildings by promoting their re-use. “In cities, kura were used primarily for the safekeeping of valuables, including family heirlooms and merchandise,” he explained. “Wealthy families had vast stores of dishes, artwork and kimono that were used only for special events or in specific seasons. Traditional homes had little storage space, so valuables were stored in an outbuilding constructed to be resistant to fire, weather and theft.”
These storehouses were usually built some distance from the main dwelling or shop to reduce the risk from fires caused by cooking or heating.
“One reason you see kura surrounded by modern buildings is that they were more likely than other traditional structures to survive fire and disaster,” Kanai said. “It’s very interesting to look at photographs taken immediately after the Great Kanto Earthquake in 1923, and the firebombing in 1945. What you see is a lot of rubble with just the kura left standing.” Even when people rebuilt by choice, they often took down the main house but left the kura intact.
“A kura was a status symbol,” Kanai explained. “It told the world you had something valuable enough to need protecting, and that you had the money to build one.”
In fact, the expression “kura o tateru” (“to build a storehouse”) is another way of saying “to become a financial success.”
Building an earthen storehouse was indeed an expensive undertaking. First you had to lay a stone foundation to support the wooden frame, which was usually built with massive logs. Then you would affix bamboo or palm lathing to the frame, and apply layer after layer of clay to form the interior walls. When all that was dry, you would finish the walls by meticulously applying thin layers of a plaster called shikkui. It’s shikkui that gives dozō storehouses their distinctive white exterior.
The thick clay walls not only helped protect the kura from fire, but they also provided a high degree of insulation. This made kura ideal for the production of fermented products that need to be protected from wide temperature fluctuations, such as sake, soy sauce and miso. Generally the storehouse was topped with a sturdy tile roof and fitted with special fire-resistant doors and shutters for the windows.
Those doors and shutters deserve special mention because they were an important advance in technology, particularly for city dwellers in Edo (present-day Tokyo) who lived under the constant threat of conflagration. To make dozō more fire-resistant, doors and shutters were fitted with a series of steps, called jabara, that fit into corresponding steps on the frame. This made the doors and windows nearly air-tight when closed, which helped prevent fires from reaching the interior of the storehouse.
By the Meiji Era, techniques in kura construction had proved so effective against fire that they were adopted for regular dwellings and shops. A good example of this architecture, which is called kurazukuri, can be seen in the town of Kawagoe in Saitama Prefecture. After a fire in 1893 destroyed a third of the town, many merchants rebuilt using jabara windows and doors combined with thick earthen walls that they covered with a distinctive black plaster made with charcoal. About 30 of these shops survive, making the town a popular tourist destination. There’s even a little kura museum.
Many surviving kura are being converted into homes, offices and restaurants, a trend that JMRA is encouraging through a new book that details the conversion of 44 storehouses around the country.
“There is something very charming about kura that seems to speak to people,” Kanai observed. “I think it’s their simplicity, durability and timeless functionality.”
Somewhat different from kura in style, but sharing the same purpose, are the treasure houses associated with well-endowed religious establishments. The most famous is the Shosoin at Todaiji which contains many national treasures from the Nara period. These are usually built of wood, especially sugi (Japanese cedar) which is very slow to burn. Wooden logs are stacked together in the style of a log cabin. Humid weather in the summer makes the wood expand and close off the building to the ill effects of damp. Dry winter weather causes the wood to contract so that air flows freely.