Emperor Ankō

was the 20th emperor of Japan, according to the traditional order of succession. Historians consider details about the life of Emperor Ankō to be possibly legendary, but probable. The name Ankō"-tennō" was created for him posthumously by later generations. 
No certain dates can be assigned to this emperor's life or reign. The conventionally accepted names and sequence of the early emperors were not to be confirmed as "traditional" until the reign of Emperor Kammu, who was the 50th monarch of the Yamato dynasty.
Traditional history.
The "Kojiki" and "Nihon Shoki" record that Ankō was the second son of Emperor Ingyō.
Some accounts report that Ankō murdered his own father.
Events of Ankō's life.
Very little is known about the events of Ankō's life and reign. Only limited information is available for study prior to the reign of the 29th monarch, Emperor Kimmei.
It is believed that Ankō was murdered in the third year of his reign.
After his death.
This emperor's official name after his death (his posthumous name) was regularized many centuries after the lifetime which was ascribed to Ankō.
According to the Imperial Household Agency, the emperor's final resting place is in an earthen tumulus ("kofun"). This emperor is venerated at a memorial Shinto shrine ("misasagi") which is associated with the burial mound.