Emperor Kaika (開化天皇 Kaika Tennō) is the ninth 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". He was the eighth of eight emperors without legend. In Kojiki and Nihonshoki, only his name and genealogy were recorded. Although his existence was traditionally believed and a tomb was attributed to him, contemporary studies support the view such a person did not exist while some still assume he existed. (Albeit with insufficient materials to prove his existence.) His Imperial Majesty, Emperor Akihito of Japan The Emperor of Japan (天皇, tennō) is Japans titular head of state and the head of the Japanese imperial family. ... His Imperial Majesty, Emperor Akihito of Japan The Emperor of Japan (天皇, tennō) is Japans titular head of state and the head of the Japanese imperial family. ... Kojiki or Furukotofumi (古事記) is the oldest known historical book about the ancient history of Japan. ... Nihonshoki (日本書紀) is the second oldest history book about the ancient history of Japan. ...

The following is a traditional list of Emperors of Japan. ...