In addition, according to "Kakai-sho Commentary" by Yoshinari YOTSUTSUJI, the term originated from "Daijokan-hi-kan" (a government official reporting directly to the Daijokan, written as “太政官被官”) which contains the phonetic equivalent of "Jokan," sometimes written as "上官."
なお、四辻善成の『河海抄』には、「政官」は“太政官被官”に由来し、宛字として「上官」を用いたと記されている。