What world flags have rotational and lines of symmetry?

Several world flags exhibit rotational and lines of symmetry. Notable examples include the flags of Japan, which has a circular disc centered on a white field, demonstrating both line symmetry and rotational symmetry. The flag of Nepal, while unique in shape, has line symmetry along its vertical axis. Additionally, the flags of Greece and the United States have line symmetry due to their striped designs, although they do not possess rotational symmetry.