What do emperors do to become emperors?

December 25th 1926 when his father (Emperor Taisho (Yoshihito)) died.

Military campaign to defeat all enemies and then he declared himself emperor.

It is not enough to be a son of an emperor, in order to become the next emperor, since an emperor may have more than one son, and they can't all be emperor (well, they could if they wanted to form a...

He paid for it Usually when his dad is the emperor. But some became emperors after they destroyed another kingdom or dynasty.

Augustus came to power by very smartly doing things for the empire and when the time came to become emperor he actually asked the senate if he could have all the power and they just gave it to him....