A legendary account from the Kojiki states that Suizei became emperor after receiving the title of crown prince by his half brother due to his bravery regarding a murder plot.

Kamuyaimimi ceded his rights as crown prince shortly after to Suizei as he believed his braver younger brother should be the new Emperor.

[8] Emperor Suizei's pre-ascension name remains unknown, but the Kojiki records that he ruled from the palace of Takaoka-no-miya (葛城高岡宮)[b] at Katsuragi in what would come to be known as Yamato Province.

Emperor Suizei allegedly died in 549 BC and his gravesite is formally named Tsukida no oka no e no misasagi.

[13] His name might have been regularized centuries after the lifetime ascribed to Suizei, possibly during the time in which legends about the origins of the imperial dynasty were compiled as the chronicles known today as the Kojiki.

Unless otherwise noted (as BC), years are in CE / AD  * Imperial Consort and Regent Empress Jingū is not traditionally listed.