Ukita Motoie served as a bushō during the Azuchi-Momoyama period. Motoie was a retainer of the Ukita clan based in Bizen Province. He was the son of Ukita Haruie and adopted son of Ukita Naoie, a sengoku daimyō. Alternatively, he may have been the son of Ukita Tadaie, the lord of Kameyama Castle.
Around 1562, Motoie was born as the son of either Ukita Haruie or Ukita Tadaie. In 1579, after a peace agreement was reached between the Ukita and Oda clans, Motoie served as the representative of Ukita Naoie in a meeting with Oda Nobutada.
In the summer of 1581, Motoie served as the commander-in-charge of Ukita forces at the Battle of Hachihama, and fought against Hoida Motokiyo of the Mōri clan. During this battle, Motoie died after being struck by a stray bullet. Ukita Haruie and Ukita Tadaie also participated in this battle, and Haruie may also have been killed.