This paper establishes the dates for some important events that happened during the formative years of the Yamato
Kingdom (366-405 CE) on the basis of the Nihongi system of dates corrected by the records of Samguk-sagi, and reinterprets
the related Nihongi records as well as the associated historical facts. From 266 CE to 413 CE, the Japanese Islands
are never mentioned in the Chinese dynastic chronicles. The main objective of this paper is to provide a plausible
model on the origins of Yamato dynasty and the roots of the imperial family, focusing on this gap of 147 years.