Mount Aso
Kumamoto Prefecture is roughly divided into three areas, namely, the northern area with Kikuchi River, Shirakawa River and Mount Aso Area; the Kumagawa Area including the Hitoyoshi Basin and the Amakusa Island Area. The first one is the Kumamoto han, and the second the Hitoyoshi han and the third one is the Amakusa Area, once controlled by the Tokugawa shogunate.