| In addition, koka was required to stabilize the prices in the capital (Heian-kyo) and to control foreign trade in Dazai-fu (local government offices in Kyushu region) (because the imported goods were mostly consumed in Heian-kyo, prices there and foreign trade were closely related). |
また、中央においては都（平安京）における価格安定や大宰府における対外貿易の統制（輸入品の多くは平安京で消費されたために、両者には連動性があった）の估価が必要とされていた。 |