| Heizei | |
|---|---|
| Emperor of Japan | |
| Reign | 806–809 |
| Coronation | 9 April 806 |
| Predecessor | Kammu |
| Successor | Saga |
| Born | 773 |
| Died | 5 August 824 (age 51) Heijō-kyō (Nara) |
| Burial | Yamamomo no misasagi (Nara) |
Emperor Heizei (平城天皇, Heizei-tennō; 773–5 August 824), also known as Heijō-tennō. was the 51st emperor of Japan, according to the traditional order of succession. Heizei's reign started in 806 and ended in 809.
Before he became the monarch, this prince's personal name (imina) was Ate (安殿).
Heizei was the eldest son of the Emperor Kammu.
He had three empresses and seven sons and daughters.
Before he became the monarch, he was Crown Prince for over twenty years.
According to the Imperial Household Agency, the mausoleum (misasagi) of Heizei is in Nara. The emperor is traditionally venerated at a memorial Shinto shrine at this location. The site can be visited by the public.
The years of Heizei's reign are identified by only one era name (nengō).

| Preceded by Emperor Kammu |
Emperor of Japan Heizei 806–809 |
Succeeded by Emperor Saga |