Japan Population Pyramid 2024. Elderly population will be more than twice of the young population at 2024. The population density of japan has changed from 318.8 in 1980 to 344.8 in 2022.

In 2009, the population was 128.56 million and is expected to be 126.48 million by the end of 2020. The population of japan in 2023 was 123,294,513, a 0.53% decline from 2022.