Kumagawa-Juku Kudzu Starch （若狭鯖街道熊川宿資料館（宿場館） 展示説明：熊川葛） 熊川葛
Official explanation
Kudzu (Japanese arrowroot; Pueraria montana var. lobata) is a climbing vine of the legume family that grows rampantly in fields and mountains. It is traditionally regarded as one of the seven flowering plants representing autumn and is mentioned in the eighth-century Man’yoshu, Japan’s oldest collection of poetry. Starch has been produced from kudzu roots for centuries and remains a valuable ingredient for food and medicine to this day. When cooking, it is primarily used to make traditional sweets, such as gelatinous kuzu manju and chewy kuzu mochi, or as a thickening agent. As herbal medicine, it is commonly mixed into drinks to improve blood circulation and to alleviate early cold symptoms such as chills and stiffness.
Kumagawa-Juku Starch in Historical Documents
Read the full explanation
Kudzu starch from Kumagawa-juku has long been renowned for its excellent quality. Wakasako and Wakasa gunkenshi, two books written in the Edo period (1603–1867) about the history of the Wakasa region, confirm that starch made in Kumagawa-juku was sold in the old capital of Kyoto in the seventeenth century. In 1830, the Confucian scholar Rai San’yo (1780–1832) sent starch from Kumagawa-juku to his sick mother in Hiroshima. The accompanying letter included instructions for preparing a boiled mixture of starch and ginger to help moisten the lungs. Rai praised the quality of Kumagawa-juku kudzu starch as more refined compared to starch made in the Yoshino region of Nara Prefecture, another area famous for the product.
Production Process
The high grade of kudzu starch made in Kumagawa-juku can be attributed to the months-long traditional production method and the quality of water used in the process. Production begins in the winter, since the roots must be harvested before the plant expends nutrients on spring growth. After being washed and peeled, chunks of the thick root are crushed and put through a strainer. The resulting mash is then repeatedly soaked in fresh, cold water. Impurities are removed through a filtering process that is performed multiple times until the white substance left behind reaches the desired quality. After settling, the paste-like starch is left to dry, solidifying into a powdery block that can be broken up and sold to customers.
Preserving Traditional Techniques
Most kudzu starch producers throughout the country now use more modern equipment. However, the Kumagawa Kudzu Promotion Society is dedicated to preserving traditional regional techniques and passing them on to future generations. It operates a small factory at the former site of the Kumagawa-juku magistrate’s office, harvesting kudzu roots in the nearby mountains and following the centuries-old process to create starch of the highest quality.
出典: 地域観光資源の多言語解説文データベース（観光庁） — www.mlit.go.jp/tagengo-db. この英語解説文は観光庁の地域観光資源の多言語解説整備支援事業で作成しました。
Source: Japan Tourism Agency, Multilingual Explanation Database. This English text was produced by the Japan Tourism Agency's multilingual explanation project and is shown unedited. Opening hours and services may have changed since it was written.
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