data japan 2023Total population for Japan in 2025 was 123,294,513, a 0.53% dec from 2022. Total population for Japan in 2022 was 123,951,692, a 0.53% dec from 2021.Statements that can be derived from Japan's population data. Japan has a population of 123,753,041 people, as of July 1, 2025. Japan's population is equivalent to 1.55% of the total