According to "Buke Meimoku-sho" (Compilation of historical data of the Edo period), this had been a hereditary post of the Ota and Shinshi clans, although there were some records about the annual events such as New Year's rite - shikisankon (three trays of drink and food) - in which the Shinshi clan took charge of the meals for the shogun, it seems that Kugokata itself was not constantly occupied by specific clans, because there are such cases as follows:
『武家名目抄』によれば、太田氏・進士氏の世襲の職とされているが、進士氏が年始の式三献など恒例行事の供御を務めた例はあるものの、次のような記事が見られるため、供御方そのものは必ずしも特定の氏の世襲ではなかったと考えられている。