 Emperor Keiko till Emperor Ingyo (376-453 AD) are considered as might be real.Emperor Ankō (401-456) of the 5th century AD, traditionally the 20th emperor, is the earliest generally agreed upon historical ruler of all or a part of Japan.The reign of Emperor Kinmei ( – 571 AD), the 29th emperor, is the first for which contemporary historiography is able to assign verifiable dates; however, the conventionally accepted names and dates of the early emperors were not to be confirmed as "traditional" until the reign of Emperor Kanmu (737–806), the 50th sovereign of the Yamato dynasty.