The gourd is harvested between late July and September. The white flesh of the gourd is cut into strips 3 cm wide and 3 mm thick, then either dried in the sun or dehydrated.[7][failed verification] Over 200 tons a year of dried kanpyō are produced per year.[3] Kanpyō available in the United States is sometimes chemically bleach-dried to a very white color, as opposed to the creamy color of the naturally-dried kind.[5]Sulfur dioxide is sometimes used as a fumigant but must not be used in concentrations exceeding 5.0 g per 1 kg of dry matter.[8]
Dishes featuring kanpyō
In addition to being the focus of many dishes, kanpyō strips are frequently used as an edible twist tie in dishes such as fukusa-zushi and chakin-zushi.[3] Typically the dried strips are boiled to soften, and then boiled a second time with soy sauce, sugar, and other ingredients added for flavor.[3][9]
^National Academies of Sciences, Engineering, and Medicine; Health and Medicine Division; Food and Nutrition Board; Committee to Review the Dietary Reference Intakes for Sodium and Potassium (2019). "Chapter 4: Potassium: Dietary Reference Intakes for Adequacy". In Oria, Maria; Harrison, Meghan; Stallings, Virginia A. (eds.). Dietary Reference Intakes for Sodium and Potassium. The National Academies Collection: Reports funded by National Institutes of Health. Washington, DC: National Academies Press (US). pp. 120–121. doi:10.17226/25353. ISBN978-0-309-48834-1. PMID30844154. Retrieved 2024-12-05.
^ ab"祝!「歴史とロマンのかんぴょう街道」開通" [Congratulation! "History and romance Kanpyō Highway" opened] (html). Mibu Town Tochigi (in Japanese). 321-0292 栃木県下都賀郡壬生町通町12番22号. 2 March 2011. Retrieved 8 July 2019.{{cite web}}: CS1 maint: location (link)
^"かんぴょう" [Kanpyō]. Nihon Daihyakka Zensho (Nipponika) (in Japanese). Tokyo: Shogakukan. 2012. OCLC153301537. Archived from the original on 2007-08-25. Retrieved 2012-06-07.
^"食品添加物の指定、使用基準の改正等について" [About designation of food additive, revision of use standard] (html). 厚生労働省 (in Japanese). 20 January 2004. Retrieved 3 July 2019.