Emperor Sujin
Emperor Sujin (崇神天皇 Sujin Tennō) was the tenth imperial ruler of Japan to appear on the traditional list of emperors. No firm date can be assigned to this emperor and he is regarded by historians as a "legendary emperor". This does not necessarily imply that no such person ever existed, just that there is insufficient material to assign him to a historical period.
According to Kojiki and Nihonshoki he was the second son of Emperor Kaika. He founded some important shrines in Yamato province, sent generals to subdue local provinces and defeated a prince who rebelled against him. He is believed to have subdued Queen Himiko or her successor.
Some historians identify him with the Emperor Jimmu and consider that the legend attributed to Jimmu was originally based on the life of Sujin. Other scholars assume his legend reflected the switching of dynasties and powers in Yamato province.