is a local delicacy from
Hokkaidō,
Japan. It consists of the
kidney
The kidneys are two reddish-brown bean-shaped organs found in vertebrates. They are located on the left and right in the retroperitoneal space, and in adult humans are about in length. They receive blood from the paired renal arteries; bloo ...
of
chum salmon
The chum salmon (''Oncorhynchus keta''), also known as dog salmon or keta salmon, is a species of anadromous salmonid fish from the genus '' Oncorhynchus'' (Pacific salmon) native to the coastal rivers of the North Pacific and the Beringian ...
pickled in a salt solution until a dark brownish black.
It is often served with alcohol or as a side dish.
References
Japanese seafood
Hokkaido
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