What is the capital of Japan?

Tokyo is the capital of Japan and serves as the political, economic, and cultural center of the country. It is one of the most populous cities in the world and plays a significant role in global affairs. The city has a rich history, having been established as the capital in 1868 when Emperor Meiji moved the imperial seat from Kyoto to Tokyo, then known as Edo. This move marked the beginning of the modernization of Japan.

Beijing is the capital of China, and while it is an influential city in Asia, it is not related to Japan. Seoul is the capital of South Korea, making it another important city in the region but unrelated to Japan's capital. Bangkok is the capital of Thailand and is significant in Southeast Asia, yet again, it does not represent Japan. Understanding these geographical distinctions highlights why Tokyo is the appropriate answer.