What's the mainstream consensus on the early Japanese Emperors? Did Jimmu exist? Are the ages just embellished and exaggerated? Or are early figures like Jimmu entirely mythical?
Most historians of Japanese history do not believe that the first nine Japanese emperors existed, at least not how they are said to
Some historians accept the existence of Emperor Sujin, who supposedly reigned from 98 BC- 30 BC, but they do not believe the dates given, which indicate that he ruled for 68 years and lived to the age of 119.
Now, the first emperor who we have solid dates on is Emperor Kinmei, the 29th emperor of Japan, said to have lived from 509-571, and ruled from 539-571.
The dates on all emperors from the era, especially those dates and lifespan are calculated from the traditional Japanese calendar, should be taken with a grain of salt.