During the Edo period, Kiso supplied a large amount of timber to Owari for the construction of Nagoya Castle. Over time, craftsmen also began making wooden barrels from sawara, one of Kiso’s five major trees. Over time, increasing numbers of barrel craftsmen moved to Okeyacho in Nagoya, and it became Japan’s leading producer of large wooden barrels. In addition to being widely used in households, the barrels were essential for the production of Hatcho miso, one of Aichi Prefecture’s specialty products. Microorganisms in the wood fibers create miso’s deep, distinctive flavor.