Also, the 'History of the Mongols,' a subsection of the "Compendium Chronicle (Jami al-Tawarikh)," stated that there was a large island named Jimangu (جمنكو Jimangū?), which was surrounded by a great ocean, located to the southeast, 400 farsang (or about 2,000km; farsang is an Iranian or Persian unit of measurement for how far a man can walk in one day) off the coast of the Jurchen and Goryeo (جورجه و كولى Jūrja wa Kūlī) regions.
また、『集史』「クビライ紀」によると、「東南方、環海中、女直と高麗（جورجهوكولىJūrjawaKūlī）地方沿岸近くに大島があり、それはジマングー（جمنكوJimangū?）という名前で（女直や高麗の地域から）400ファルサング（約2,000km）離れている。」とある。