Iri is home to a large calm bay with a long history of oyster farming. The oysters are grown in the shallow waters protected from rough and extreme waves by nearby small islands. This enviornment aides in the growth of phytoplankton rich in nutrients and minerals, crucial to the oyster diet. Farmers here also take care to ensure that after each production cycle the sea floor is cleaned to assure a safe and healthy environment for the oysters.

Iri is home to a large calm bay with a long history of oyster farming. The oysters are grown in the shallow waters protected from rough and extreme waves by nearby small islands. This environment aids in the growth of phytoplankton rich in nutrients and minerals, crucial to the oyster diet. Farmers here also take care to make certain that after each production cycle the sea floor is cleaned, providing a safe and healthy bed for the oysters.

Hinase village has been a prosperous fishing village since time immemorial. The sea included in present day Bizen City features a complex array of 13 islands of various sizes nestled together. The diverse ecosystem in the area is home to a wide variety of sea life, including oysters. The habitat here is known for its "sea meadow" consisting of common eelgrass. Recent restoration of this habitat has brought with it a resurgence of life, which has been a boon to all seafood products produced here, including the delicious oysters.

From the Edo era through the Meiji era (17th to 19th century), Ako harbor flourished as a major exporter of processed salt. In contrast to its dynamic and turbulent history, its seas are gentle and calm. The area around Sakoshi is a national park, and the nearby Chikusagawa River is registered as one of Japan's top 100 natural spring water destinations. The waters here are teeming with plant-based plankton, which is ideal for producing plump, delicious oysters. Sakoshi oysters are also renowned for their juicy texture and sweet taste, which contribute to their status as a luxury item amongst seafood purveyors. These oysters have turned many oyster skeptics into oyster lovers.

Aioi was founded as a shipbuilding town. Its bay is deep but calm, shielded by capes from rough waters. With a similar terroir to its neighbor Sakoshi, it is also home to a nourishing habitat, producing some of the best oysters in Japan. Aquaculture in Aioi began some years after the practice took hold in Ako, but it has since grown to be a major industry.