Tokyo's size can be understood in different ways depending on the definition used:
- The Tokyo Metropolis area itself covers about 2,194 km² (847 square miles), with a population of around 14 million people.
- The Greater Tokyo Area, which includes Tokyo Metropolis along with surrounding prefectures like Kanagawa, Saitama, Chiba, and others, covers approximately 13,500 km² (5,200 square miles) and has a population of about 38 to 40 million people.
- This Greater Tokyo Area is the most populous metropolitan area in the world and stretches over a vast region larger than some small countries.
- The core 23 special wards of Tokyo cover about 622 km² and have a population around 9 million.
Thus, Tokyo is a huge metropolis both in terms of land area and population, with the Greater Tokyo Area extending over 13,500 square kilometers and hosting nearly 40 million people.
