Cedar bark roofing, cypress bark roofing, and shingle roofing: Background of the project / Social issues
Inheritance and Rediscovery of Traditional Techniques! Bringing Japan's Ancient Traditional Roofing Methods into New Architecture.
Hinoki bark roofing is a traditional Japanese roofing technique that uses materials shaped from the bark of hinoki trees. It allows for elegant curves and a sense of weightiness in the eaves, and is primarily seen in important cultural properties today. Since only the bark is harvested from standing hinoki trees, it is considered an environmentally friendly method. However, the decreasing availability of harvestable hinoki, the aging and decline of craftsmen (known as "motokawashi"), and those who produce the products (known as "hiwadakoshiraeshi") have made securing materials increasingly difficult. "Hiwadaya Co., Ltd." was incorporated in 1994, continuing the tradition of "Hiwadaya," which has existed since the Tenpo era (1830s). The representative, Makoto Sasaki, is the only hinoki bark roofer in Yamaguchi Prefecture. Hiwadaya Co., Ltd. will continue to preserve and pass on the unique traditional architectural culture of hinoki bark roofing in Japan. [Main Products Used] ○ Nagahira (2 shaku 5 sun) → Approximately 75 cm in total length, with 120 pieces (1 bundle) shaped into a trapezoid. ○ Skilled craftsmen produce 1 to 2 bundles per day. → Each product requires 10 kg to 15 kg of bark to make. ○ About 2,000 bundles of this product were used in the construction of Ryufukuji Temple in Yamaguchi City, Yamaguchi Prefecture. For more details, please contact us or download the catalog.
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basic information
【Process of Hinoki Bark Roofing Work】 ○ Collection → The raw bark specialist collects the bark from hinoki trees that are over 80 years old. → The bark obtained from one tree is approximately 20kg to 30kg. ○ Processing → The hinoki bark processor uses a special knife to process the bark. → The bark is evenly peeled (washed). → It is shaped into the required form (cutting). → The pieces are bundled together in the correct quantity. ○ Construction → The hinoki bark roofer uses it for roofing work. → Approximately two tatami mats worth are installed in a day, using 14 bundles of the product. ● For more details, please contact us or download the catalog.
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Hiwadaya Co., Ltd. was established as a corporation in 1994, continuing the tradition of "Hiwadaya," which dates back to the Tenpo era (1830s). The representative, Masashi Sasaki, is one of the few hinoki bark thatchers in the country. Hinoki bark thatching is a roofing construction method where materials made from the bark of hinoki (Japanese cypress) are secured with bamboo nails, as seen in structures like the Kyoto Imperial Palace, Kiyomizu Temple, and Itsukushima Shrine. We carry out roofing work using traditional Japanese techniques such as hinoki bark thatching, kakibuki (kokerabuki), sugi bark thatching, thatching, and copper roofing, honed through experience in shrines and temples. We receive numerous repair requests for properties with a focus on sukiya architecture and garden gates from all over the country. We are available for nationwide travel and will respond promptly to specific project estimates. Please feel free to contact us! We also recommend our custom-made high-end interior panel material "kasane," made from hinoki bark, for special clients. http://ka-sa-ne.com/