Konnyaku Konjac Jelly Processing Culture

Japan (Tochigi, Gunma, and Fukushima prefectures as major konjac production regions; ancient processing tradition)

Konnyaku (蒟蒻, konjac jelly) is a firm, gelatinous food made from the starch of the konjac plant (Amorphophallus konjac), which grows in Japan and East Asia. The tuber produces a glucomannan starch that, when mixed with water and an alkaline coagulant (calcium hydroxide — slaked lime), forms a firm, rubbery gel with an extraordinary property: it is almost entirely indigestible dietary fibre with effectively zero calories. Konnyaku is produced as blocks (ita konnyaku — flat slabs) or as noodle-like strings (shirataki — 'white waterfall'). The distinctive alkaline, slightly fishy aroma of konnyaku is a result of the calcium hydroxide coagulation process and can be reduced by parboiling before use. Konnyaku absorbs flavours remarkably well during simmering — though it never completely loses its firm, bouncy, slightly chewy texture (the texture Japanese call 'puyo-puyo'). It is used in oden (hot pot stew), sukiyaki, niku jaga, dengaku (miso-glazed), and as an addition to various nimono. Black konnyaku (kuro konnyaku) is made with nori or hijiki seaweed incorporated, producing a dark colour and slight marine flavour. The health food boom has positioned konnyaku as Japan's original 'zero calorie' food.

Almost neutral with a slight alkaline note; absorbs surrounding flavours; the texture — firm, elastic, slightly bouncy — is the primary sensory contribution