Tachibanayama Castle was a Japanese castle in Chikuzen Province, in the north of Kyūshū. It was at the peak of Mount Tachibana, extending in part into the Higashi-ku in Fukuoka. The castle is also kno

The Ōtomo clan was a Japanese samurai family whose power stretched from the Kamakura period through the Sengoku period, spanning over 400 years. The clan's hereditary lands lay in Kyūshū.