Material：
Data Population in Japan (Year 1920-2020) En
PDF
Data Population in Japan (Year 1920-2020) En
CSV
Data Population Aged Over 65 (Year 1920-2020) En
PDF
Data Population Aged Over 65 (Year 1920-2020) En
CSV
Data Population Aged Under 15 vs Over 65 (Year 1950-2020) En
PDF
Data Population Aged Under 15 vs Over 65 (Year 1950-2020) En
CSV
Map East Asia
PDF
Commentary：
人口 (
Hiragana: じんこう
Romaji: Ji-nn-ko-u) means Population in Japanese. 人口 is a technical term, also referred to as 人数 in everyday conversation.
Further study：
Japan Ministry of Education (文部科学省).
学習指導要領 生きる力. 2017.
Republic of Korea Ministry of Education (대한민국
교육부).
People's Republic of China Ministry of Education (
中华人民共和国教育部). Tōngyòng Guīfàn Hànzì Biǎo (通用规范汉字表). 2013.
U.S. Department of Education (アメリカ合衆国教育省).