Antei (安貞) was a Japanese era name (年号,, nengō,; lit. "year name") after Gennin and before Kangi. This period started in December 1227 and ended in March 1229. The reigning emperor was Go-Horikawa-tennō (後堀河天皇).
| Antei | 1st | 2nd | 3rd |
|---|---|---|---|
| 1227 | 1228 | 1229 |
| Preceded by: Gennin |
Era or nengō: Antei |
Succeeded by: Kangi |