A STOREHOUSE for the safekeeping of merchandise, the kura (or dozo: earthen storehouse) has walls of layered mud plaster nearly 30cms thick. Besides protecting the kura from fire, the thick walls also provide a high degree of insulation and keep the interior room temperature uniform throughout the seasons. This is important for storing sake, soy sauce, miso and other commodities that need to be protected from wide temperature fluctuations. ►The thick walls have a large heat capacity and moisture capacity, so even on a humid 35C (100F) summer day, the inner wall surface stays cool. ►The walls' outer layer of white plaster (shikkui) deflects sunlight and reduces their solar heat gain, by day, and promotes their radiant cooling by night. ►The roof of the kura is an elevated canopy with a layer of air underneath. As the roof surface grows hot, its heat is quickly released back into the air. (photograph © K. Shimizu)
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