The largest city in the world by population is Tokyo, the capital of Japan. Its metropolitan area boasts a population of over 37 million people, making it a vibrant and bustling hub. Tokyo is renowned for its blend of traditional culture and modern technology, highlighted in its architecture, cuisine, and fashion. It also serves as an influential economic center, hosting a myriad of global corporations and startups. The city's efficient public transportation system and wide-ranging amenities enhance its international appeal.