Tsukudaru is seafood, meat or seaweed that has been cooked in soy sauce and mirin .
Soy sauce preserves ingredients naturally.
It's name originates from Tsukudajima island where it was first made in the Edo era. Soysauce preserves dried ingriedents for long time so tsukudani can be used anytime. Many kinds of tsukudani are sold. Tukudani can be made at home by using seasonal vegetables and left over seaweed. Shigureni is seafood or meat that has been cooked in soy sauce and mirin .