noun
seaweed salt; salt from burning seaweed
Traditional Japanese salt made by burning seaweed and mixing the ashes with seawater, then boiling it down. Often associated with ancient salt-making methods and poetic references.
藻塩は古来の製塩法で作られる。
Seaweed salt is made using an ancient salt-making method.
万葉集には藻塩を詠んだ歌がある。
There are poems about seaweed salt in the Man'yōshū.