Meaning of dashi
Dashi (出汁, だし) is a
class of soup and cooking stocks considered fundamental to
Japanese cooking. Shizuo Tsuji (1980) wrote that "many
substitutes for dashi are possible, but without dashi, dishes
are merely a la japonaise and lack the authentic flavor." Dashi
forms the base for miso soups, clear broth soups, Japanese
noodle broths, and many Japanese simmering liquids.
The most common form of dashi is a simple broth or stock made by
boiling kombu (edible kelp) and kezurikatsuo, shavings of
katsuobushi, and then straining the resultant liquid. Fresh
dashi made from kelp and katsuobushi is rare today, even in
Japan. Most people use granulated or liquid instant substitutes.
-from Wiki
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