Japanese Food Tips

Kombu (Dried Kelp)

May 9, 2026

Kombu

Kombu

Cut kombu

Cut kombu

Wakame

Wakame

Kelp is an algae that lives in the sea and adheres to rocks. Kelp and wakame are similar, but kelp is made up of a root and one large leaf at the end of a stem. Wakame seaweed has a root and a long stem from which many leaves grow. More than 95% of the kelp harvested in Japan comes from Hokkaido, and some is farmed. Harvested kelp is not only dried after being unloaded, but is also aged in a dedicated warehouse for 2 to 3 years to deepen its flavor before being shipped. Dried kelp has a longer shelf life due to its low moisture content, typically 1 to 3 years after being bagged. There may be a white powder on the surface of dried kelp, which is not mold but a flavor component. Dried kelp is used to make dashi (Japanese soup stock) and in stewed dishes. Our recipe site has a recipe for making soup stock from dried kelp if you are interested. Dried kelp can be purchased at any Japanese supermarket.

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