Kokubu (国分市, Kokubu-shi) was a city located in Kagoshima Prefecture, Japan.

Kokubu may refer to the following:

Places , the remains of a castle structure in Kirishima, Kagoshima Prefecture Kokubu Station (Kagawa), a railway station Kokubu Station (Kagoshima), a railway station

People Kokubu (written: 国分 or 國分) is a Japanese surname. Notable people with the surname include:

(born , 1973), a Japanese impressionist (monomane tarento) (1553–1615), a Japanese samurai of the Sengoku through early Edo period (born 1976), a Japanese actress and fashion model (born 1994), a Japanese football player

See also Kokubun (国分 or 國分), a Japanese surname