ken (prefecture), central Honshu, Japan, on the Pacific coast. More than half of its area lies within the Nobi Plain and two smaller plains to the east. The northwestern border with Gifu prefecture is formed by the Kiso River, sometimes known as the Nihon (Japan) Rhine. The irregular coast is marked by the peninsulas of Chita (west) and Atsumi (east), which enclose Mikawa Bay and lie within Mikawa Bay Quasi-national Park, a popular resort area.
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