Family tree of Japanese monarchs
The following is a family tree of the emperors of Japan, from the legendary Emperor Jimmu to the present monarch, Naruhito. Modern scholars have come to question the existence of at least the first nine emperors; Kōgen's descendant, Emperor Sujin (98 BC – 30 BC? ), is the first for whom many agree that he might have actually existed.
Source: Wikipedia — Family tree of Japanese monarchs (CC BY-SA 4.0)