Yonabaru Ueekata Ryōketsu (与那原 親方 良傑, 8 February 1836 – 22 December 1893), also known by his Chinese style name Ba Kensai (馬 兼才), was a politician, bureaucrat and diplomat of Ryukyu Kingdom.

His father Yonabaru Ryōkyō (与那原 良恭, also known as Ba Chōtō 馬 朝棟), was a Sanshikan from 1859 to 1871.

He Ruzhang (何如璋) and Huang Zunxian were appointed the Imperial Chinese envoy and counselor, respectively, and went to Tokyo by ship in the same year.

Ryōketsu met them secretly when their ship passed Kobe, and petitioned Qing China to rescue the Ryukyu from annexation by Japan.

The last three Sanshikan, Urasoe Chōshō, Tomikawa Seikei and Yonabaru Ryōketsu, all wanted to restore the Ryukyu Domain, and they struggled for this ideal until their deaths.