Konjac/Konnyaku in Japanese Regional Tradition
Gunma Prefecture, Japan — over 90% of Japanese konnyaku production
Konnyaku (konjac, Amorphophallus konjac) has been cultivated in Japan for over 1,500 years and is produced almost entirely in Gunma Prefecture (which supplies 90% of Japan's konnyaku). The processed corm produces a firm, gelatinous block with a neutral, slightly earthy taste, distinctive rubbery snap when chewed, and the remarkable property of being nearly calorie-free (98% water and glucomannan fibre). Konnyaku forms include: grey block (ita konnyaku) with darker specs from nori ash that give the 'speckled' appearance; white block (shiro konnyaku); shirataki (thread konnyaku, used in sukiyaki and nabe); ito konnyaku (slightly thicker threads); and tsukurizume (moulded specialty shapes). Konnyaku absorbs flavour from its cooking medium beautifully — in oden it absorbs the rich oden broth; in sukiyaki it takes on the sweet warishita. Its textural properties make it irreplaceable as both a filler (providing satisfaction without calories) and a textural element in mixed preparations.