Also known as: シーランドの国旗
The flag of the Principality of Sealand, an unrecognised micronation situated entirely on a small fort off the eastern coast of England.
According to what Michael Bates (Prince Michael of Sealand) was told by his father, Paddy Roy Bates (Prince Roy of Sealand), the red in the flag is meant to represent Roy himself, the black his days in pirate radio, and the white the "path of virtue and purity we walk today".