Ryūzōji Taneie served as a bushō from the Muromachi to Sengoku periods.  He was a retainer of the Kyūshū-Chiba clan.

Taneie was born as the eldest son of Ryūzōji Yasuie, the fourteenth head of the Ryūzōji clan who were kokujin, or provincial landowners, in Hizen.  His original name was Iehiro.  Later, he received one of the characters from his lord, Chiba Tanetomo of the Kyūshū-Chiba clan, and adopted the name of Taneie.  Although Taneie was the eldest son, diplomatic policies toward neighboring daimyō including the Ōuchi clan triggered a conflict within the family which caused Taneie to abscond.  As a result, the headship of the clan was inherited by his younger brother, Ryūzōji Iekazu.

Thereafter, he moved around to various locations in Hizen.