The Poku-Rya'ta is appointed by the Vonai-Rya'ka (Emissary) to represent the interests of the Poku Saeruo Degonjo. They are appointed to a specific faction. They represent the Vonai-Rya'ka and the clan at formal functions. They are also responsible with controlling the Kavoráy Rouka (Embassy).

The position came back into use in 754 CY (YE 35) when Kohaku Syali appointed the first for Yamatai Star Empire.