Opinions concerning the Hashihaka Tumulus differ among scholars, though recently it is widely accepted that the tumulus was created between the mid-third century (which is close to the year of Himiko's death in 248) and the latter half of the third century.
箸墓古墳の築造年代についても、研究者により多少の前後はあるものの卑弥呼の没年（248年頃）に近い3世紀の中頃から後半と見る説が最近では一般的になっている。