Japonica clams, also known as Japanese clams or Manila clams, are a type of shellfish native to Asia, especially to the coasts of Japan and the Philippines. They have spread around the world due to their commercial and gastronomic value, and are considered an invasive species in some areas.
They have two shells hinged together and a musculature that allows them to close hermetically to protect themselves from predators. They are very similar to other clam species, such as white clams or blond clams, but can be distinguished by their size and their more elongated and pointed shell.