Kokubu Castle (国分城, Kokubu-jō) also called Maizuru Castle is the remains of a castle structure in Kirishima, Kagoshima Prefecture, Japan.

The site is called a Kokubu castle, but it is a fortified residence rather than a castle.

[1] In 1604, Shimazu Yoshihiro built the castle and moved from Tomiguma Castle.

[2] Shimazu Yoshihisa lived a retired life in the castle, he died January 21 in 1611[3][2] Currently Kokubu elementary school is on site, but stone walls, moats and gates still remain.

[4]