A further theory is that the royal family or nobility of the Former Qin dynasty founded by the Fu clan of the Di ethnic group during the Period of Sixteen Kingdoms finally reached Japan in the midst of war by way of the Korean Peninsula.
また一説には五胡十六国時代に氐族の苻氏が建てた前秦の王族ないし貴族が戦乱の中、朝鮮半島経由で日本にたどり着いたと言う説もある。