Yonabaru Ueekata Ryōtō (与那原 親方 良頭, 4 April 1737 – 20 November 1803^[1]) also known by Yasumura Ueekata Ryōtō (安村 親方 良頭) and his Chinese style name Ba Bunzui (馬 文瑞), was a bureaucrat of Ryukyu Kingdom. He was born to an aristocrat family called Ba-uji Yonabaru Dunchi (馬氏与那原殿内).

King Shō On dispatched a gratitude envoy for his accession to Edo, Japan in 1796. Prince Ōgimi Chōki (大宜見 朝規, also known by Misatō Chōki 美里 朝規 and Shō Kaku 尚 恪) and he was appointed as Envoy (正使, seishi) and Deputy Envoy (副使, fukushi) respectively. They sailed back in the next year.^[2]

He served as a member of Sanshikan from 1798 to 1803.^[1]