The nation flag of Katachon is the national flag of Kingdom of Katachon or simply Katachon. It's a British Blue Ensign defaced with the national coat of arms on a white disc in the fly. The national coat of arms of Katachon is a light blue Maltese Cross with an imperial crown in the centre of the cross.
The flag dates from 1870, with none variations, and the coat of arms was designed by Henri Lincoln, an American-Irish but British born designer.
It's the only national flag of the country since the independence on January 1 in 1873.