What can be said about information on Japan documented during the Mongolian Empire period, or the Yuan Dynasty, is that the subsection on Japan, 'Japan Accounts' (日本伝), of the 'History of Song Dynasty,' which was complied in the late Great Yuan Dynasty by Prime Minister Toktoghan recounted twenty-three generations from Amenominakanushi-no-mikoto to Amaterasu Omikami (the Sun Goddess) as 'what the Japanese chronicle had listed' and about sixty-four sovereigns, such as from the Emperor Jinmu (a grandson of Amaterasu Omikami) to the Emperor Reizei and the subsequent Emperor Enyu (the Emperor Morihira), who was the emperor of that age (the early Song Dynasty), and recorded as follows:
モンゴル帝国時代、元(王朝)時代の「日本観」についてであるが、大元朝後期に中書右丞相トクトらによって編纂された『宋史』「日本伝」では、「年代紀に記するところ」として天御中主尊から天照大神尊などの二十三世、神武天皇から冷泉天皇、（宋代初期の）当代の守平天皇（円融天皇）までの約六十四代を列記、されており、以下が記載されている。