It is clearly shown in "混一疆理歴代国都之図" (Map of Integrated Lands and Regions of Historical Countries and Capitals) which is believed to have been made based on the original drawn during the era of the Yuan dynasty.
それは元朝治下に製作された原図を基にしていると思われる『混一疆理歴代国都之図』によく表されている。