data japan 2023Japan Nominal GDP reached 991.9 USD bn in Dec 2022, compared with 1,000.8 USD bn in the previous quarter. Nominal GDP in Japan is updated quarterly, available from Mar 1957 toKey information about Japan population. The Japan population reached 123.7 million people in Dec 2025, compared with the previously reported fure of 124.3 million people in Dec 2025;