The Only Wide Plain in the Dōzen Islands
The Dōzen Islands form a caldera landscape. This kind of landscape characteristically features little flat land that can be utilized for rice farming. However, there is one wide flat area in the northern part of Nakanoshima Island (Ama Town). This area is currently the only place in the Dōzen Islands that is used for commercial rice production.
This flat land stretches from the stunningly beautiful Akiya Coast toward the central cone of the Dōzen Caldera, Mt. Takuhi (on Nishinoshima Island). This expanse was originally an inlet. However, 2.8 million years ago volcanic eruptions occurred at the entrance of the inlet, closing it off. Land accumulated and filled in the bay, creating the wide flat expanse that exists today.