As of 2023, the population of Tokyo is estimated to be 37,194,105, making it the most populous metropolitan area in the world. However, it is important to note that the population of Tokyo can be defined in different ways, leading to different population estimates. For example, the population of the 23 Special Wards, which represents the inner-urban core of the Tokyo Metropolitan Area, was approximately 9.7 million in 2020. Meanwhile, the population of Tokyo prefecture, which is the official Tokyo Metropolitan Government area, was estimated to be 14.3 million in 2020.