【Nigiri sushi: Kai】
What is Aoyagi?
Aoyagi（Round clam）is another name for bakagai shellfish and its legs are eaten. The bright orange colored flesh has a firm texture and its rich ocean flavor spread in the mouth. The name aoyagi came from its producing area, Aoyagi village (currently Ichihara city Chiba prefecture).
Also called Hen clam or Surf clam or Rediated trough-shell.
Generally shellfish has trace amounts of taurine, but there are copious amounts in round clam. This is a type of amino acid and is thought to be good for high blood pressure.
List of Shellfish (Kai)
Chiba Aichi Hokkaido Kanagawa