| Balhaego | |
|---|---|
| Hangul | 발해고 |
| Hanja | 渤海考 |
| Revised Romanization | Balhaego |
| McCune–Reischauer | Parhaego |
Balhaego is a history book about the Balhae civilization, written by Yu Deuk-gong who was a Silhak (practical studies) scholar, during the Joseon Dynasty. It describes the king of Balhae, the vassals of Balhae, geography and geology, government system, foods and clothing, etc. It is an early book that argued that Balhae should be included as part of Korean history.