Furthermore, in the entry about the titles of office written on January 15, 1191 in "Azuma Kagami" (The Mirror of the East), while the betto (the assistant chief officer) and other officers of Mandokoro and Samurai-dokoro (the Board of Retainers) were each inserted at the start of a new paragraph, the "head of Monchu-dokoro" is described in the last line of the paragraph concerning Mandokoro, which may explain, according to Fumiaki SASAKI, that the Monchu-dokoro in the beginning might have been a body belonging to the Mandokoro but later become a separate and independent body.
更に『吾妻鏡』建久2年正月15日条に書かれた職制においても、政所と侍所については行を改めて別当以下を記載しているのに対して、問注所については政所の項目の最後に「問注所執事」と1行で記されていることから、初期の問注所は政所に属する1機関であり、後に政所から分離して独立した機関となったとする説もある（佐々木文昭説）。