Anadara kagoshimensis is a marine bivalve mollusk in the family Arcidae, commonly known as the half-crenate ark shell. It is native to coastal waters of the northwest Pacific, particularly around Japan, Korea, and China, where it inhabits shallow muddy and sandy seabeds in estuarine and coastal environments. The genus name Anadara derives from Greek elements referring to an ark or chest-like form, describing the robust, boxy shell shape characteristic of ark clams, while the species epithet kagoshimensis indicates its association with Kagoshima in Japan, where it was first described. The common name “half-crenate ark” refers to the partially scalloped or crenulated margins of the shell.

This species has a thick, oval shell with pronounced radial ribs and a hinge line bearing numerous small teeth, a defining feature of the Arcidae family. Like other ark shells, Anadara kagoshimensis contains hemoglobin in its blood, giving the flesh a distinctive reddish coloration and contributing to its rich, mineral flavor. It is a filter feeder, drawing in seawater to extract plankton and organic particles, and plays an ecological role in coastal nutrient cycling and sediment interaction.

As a food source, Anadara kagoshimensis is harvested for its edible flesh, which is consumed in a variety of East Asian cuisines. In Japan it may be served lightly blanched or as sushi and sashimi preparations, while in Korea it is used in seasoned dishes and rice preparations. In China it is often stir-fried, steamed, or incorporated into soups. The texture is firm and slightly chewy, with a pronounced umami taste.

Nutritionally, this bivalve is a rich source of protein, iron, and vitamin B12, with the high iron content partly associated with the presence of hemoglobin. It also contains essential amino acids, trace minerals such as zinc and selenium, and small amounts of marine omega-3 fatty acids. Bioactive compounds include taurine and bioactive peptides, which have been studied for potential antioxidant and cardiovascular benefits. As with other filter-feeding shellfish, there is a potential risk of accumulating environmental contaminants or pathogens, so proper sourcing and preparation are important.