This is the 4538th most frequent Japanese word.
川内
"川内" means "inside the river" or can refer to a place name, such as Kawauchi.
川内市 refers to Kawauchi City, a place-name in Japan.
川内市は鹿児島県にあります。
Kawauchi City is located in Kagoshima Prefecture.
川内 denotes a general area within a river range, possibly also metaphorically representing a specific region.
川内の風景はとても美しいです。
The scenery within Kawauchi is very beautiful.
川内 identifies a location near or within the river's scope where the construction occurred.