Tsukudani

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Tsukudani is small seafood, meat or seaweed that has been simmered in soy sauce and mirin. High osmotic pressure preserves the ingredients. Its name originates from Tsukudajima island where it was first made in the Edo period. Many kinds of tsukudani are sold. Traditionally made tsukudani is preservable and has been favored as a storable side dish in Japanese kitchen since the Edo period.