The data presents the proportion of population age groups in Japan starting from 1960 with a forecast to 2040.
Overall, it can be seen that the percentage of adults aged 25 to 64 and children under 14 has a downward trend during the entire period, while the number of people over 65 will increase dramatically by 2040. However, individuals aged 25 to 64 stood out among other categories with the highest figures.
In the beginning, the people aged 25 to 64 were 65% in 1960, which was the largest index compared to others, and it almost remained unchanged until 2010, and after a while, there was a slight drop to 60% by 2020. Also, the population who aged 0-14 years showed minimal growth from 30% to 35% by 1970, and it maintained the same level from 1980 to 1990, which was 30%; noticeable decrease began in 2000 until 2020, and it dropped to 12% by 2020.
When it comes to people who aged over 65 years, it was the lowest at the beginning of the period. Additionally, it remained stable for one year, then began to rise tremendously from 1970; it leveled off at 30% in 2020 and it is expected to be 35% by 2040.