Emperor Senka

Emperor Senka (宣化天皇, Senka-tennō) (466 — 15 March 539) was the 28th legendary emperor of Japan, according to the traditional order of succession.

No firm dates can be assigned to this emperor's life or reign, but he is conventionally considered to have reigned from 25 January 536 to 15 March 539, the end of the Kofun period, which was followed by the Asuka period.

Source: Wikipedia — https://en.wikipedia.org/wiki/Emperor_Senka