Also known as: トウモロコシ, とうもろこし, 玉米, コーン
Also known as maize. A cereal that consists of a cob with countless sweet kernels growing on it. Eating it straight off the cob is 'corn on the cob'.
In UK English "corn" refers to the main cereal crop of an area. "Corn on the cob" though is universally understood to refer specifically to maize.