{
  "retrieved_at": "2026-09-17",
  "year": 2024,
  "source_name": "World Bank Population Estimates and Projections / WDI (5-year age-sex indicators source 16; broad-age and total indicators source 2; age/sex distributions based on UN Population Division WPP)",
  "source_urls": [
    "https://api.worldbank.org/v2/country/JPN;WLD/indicator/SP.POP.1519.FE?date=2024&format=json",
    "https://api.worldbank.org/v2/country/JPN;WLD/indicator/SP.POP.1519.MA?date=2024&format=json",
    "https://api.worldbank.org/v2/country/JPN;WLD/indicator/SP.POP.2024.FE?date=2024&format=json",
    "https://api.worldbank.org/v2/country/JPN;WLD/indicator/SP.POP.2024.MA?date=2024&format=json",
    "https://api.worldbank.org/v2/country/JPN;WLD/indicator/SP.POP.2529.FE?date=2024&format=json",
    "https://api.worldbank.org/v2/country/JPN;WLD/indicator/SP.POP.2529.MA?date=2024&format=json",
    "https://api.worldbank.org/v2/country/JPN;WLD/indicator/SP.POP.3034.FE?date=2024&format=json",
    "https://api.worldbank.org/v2/country/JPN;WLD/indicator/SP.POP.3034.MA?date=2024&format=json",
    "https://api.worldbank.org/v2/country/JPN;WLD/indicator/SP.POP.1564.FE.IN?date=2024&format=json",
    "https://api.worldbank.org/v2/country/JPN;WLD/indicator/SP.POP.1564.MA.IN?date=2024&format=json",
    "https://api.worldbank.org/v2/country/JPN;WLD/indicator/SP.POP.65UP.FE.IN?date=2024&format=json",
    "https://api.worldbank.org/v2/country/JPN;WLD/indicator/SP.POP.65UP.MA.IN?date=2024&format=json"
  ],
  "axes": ["location (JPN/WLD)", "year (2024)", "age group", "sex (female/male)"],
  "method": "Direct counts from each age-sex indicator; UI groups are sums of adjacent direct 5-year counts (65+ uses the direct broad-age indicator); no separate proportion multiplication.",
  "ui_indicator_codes": {
    "20-34": ["SP.POP.2024.FE", "SP.POP.2024.MA", "SP.POP.2529.FE", "SP.POP.2529.MA", "SP.POP.3034.FE", "SP.POP.3034.MA"],
    "35-49": ["SP.POP.3539.FE", "SP.POP.3539.MA", "SP.POP.4044.FE", "SP.POP.4044.MA", "SP.POP.4549.FE", "SP.POP.4549.MA"],
    "50-64": ["SP.POP.5054.FE", "SP.POP.5054.MA", "SP.POP.5559.FE", "SP.POP.5559.MA", "SP.POP.6064.FE", "SP.POP.6064.MA"],
    "65+": ["SP.POP.65UP.FE.IN", "SP.POP.65UP.MA.IN"]
  },
  "validation": {"http_status": 200, "records_per_query": 2, "non_null_values": true, "unit": "persons", "same_year": true}
}