source : ISO, GENC, FIPS, UN, WB, MOFA, Nikkei Data Visual Team, FT-meta, Owid-meta & Covid data-set
*see population_source for details
source#1: World Bank 2020
source#2: United Nations World Population Prospect 2019, estimate for 2021, medium variant
source#3: CIA World Factbook
source#4: official stats
source#5: FT meta data
source#1: ISO3
source#2: code_GENC(3digit)
source#3: FIPS
source#4: code_FT
source#5: numeric_UN
source#6: code_OWID
source#7: misc(NK1~7, FT1,OWID_REG1)
source#1: MOFA
source#2: UN
source#3: categorized by locations
data retrieved : Sep 16, 2021
source : >Nikkei-Visual-Data-Journalism, countries.csv
data retrieved : Sep 22, 2021
population in thousands
source : United Nations WPP2019
data for 2020 : sheet_name = 'ESTIMATE' / use case = Nikkei Vdata
data for 2021 : sheet_name = 'MEDIUM VARIANT' / use case = OWID covid-19 data
population in 1
source : Ministry of Internal Affairs and Communications, Japan (総務省住民基本台帳、市区町村別、年齢階級別、2021年1月1日)
all data : as of Jan 1, 2021
source : ISO 3166 Country Code
data retrieved : Sep 8, 2021
source : International Country Code, FIPS versus ISO 3166, GeoDataSource
data retrieved : Sep 11, 2021
source : Ministry of Foreign Affairs, 1) country 2) area 3) MOFA website->Coutry/Region