지쿠젠 국
In 1600, Kuroda Nagamasa received huge rewards in the form of land in Chikuzen Province for his contributions during the Battle of Sekigahara and moved into Najima Castle (名島城 Najima-jō) to form the Fukuoka han. Najima Castle had been created by Tachibana Akitoshi and was expanded by Kobayakawa Takakage, but was much too small to accommodate a large han, leading to the selection of Fukusaki hill as a new castle site.