Which country has a flag with a circle representing the sun?

• A. Japan
• B. China
• C. South Korea
• D. Vietnam

Answer: (A)

Flag symbolism focused on a sun disc identifies Japan. The flag shows a red circle centered on a white field, representing the sun. This sun symbol is tied to Japan’s name and identity, with Hinomaru meaning the circle of the sun (and Nippon/Nihon often translated as the origin of the sun or land of the rising sun). The other flags use different imagery—China has a red field with stars, South Korea features a yin-yang with trigrams, and Vietnam shows a yellow star on red. So the flag with the sun-disc design belongs to Japan.