“Bakagai”, or Round clam/Hen Clam in English is found mainly in the Central part of Honshu Island
Actually, you have a good chance to discover it at low tide all over Japan.
It is a versatile shellfish as it provides for two distinct morsels:
The “Tongue” called “Aoyagi”. It is very popular in Japan for its color and sweetness. It is both eaten as Sashimi and Sushi as nigiri. The second morsel, one of two muscle parts is called “Kobashira/Small pillar”.