Falling birth rates are a major concern for some of Asia’s biggest economies. Government s in the region are spending hundreds of billions of dollars trying to reverse the trend. Will it work?

Japan began introducing policies to encourage couples to have more children in the 1990s. South Korea started doing the same in the 2000s, while Singapore’s first fertility (生育) policy dates back to 1987. China, which has seen its population fall for the first time in 60 years, recently joined the growing club.

While it is difficult to quantify exactly how much these policies have cost, South Korean President YoonSuk-yeol recently said his country had spent more than $200bn (£160bn) over the past 16 years on trying to boost the population. Yet last year South Korea broke its own record for the world’s lowest fertility rate, with the average number of babies expected per woman falling to 0.78. In neighbouring Japan, which had record low births of fewer than 800,000 last year, Prime Minister Fumio Kishida has promised to double the budget for child-related policies from 10tn yen ($74.7bn; £59.2bn).

Having a bigger population who can work and produce more goods and services leads to higher economic growth. And while a larger population can mean higher costs for governments, it can also result in bigger tax revenues (税收). Also, many Asian countries are ageing rapidly. Japan leads the pack with nearly 30% of its population now over the age of 65 and some other nations in the region are not far behind. Compare that with India, which has just overtaken China as the world’s most populous nation. More than a quarter of its people are between the age of 10 and 20, which gives its economy huge potential for growth. And when the share of the working age population gets smaller, the cost and burden of looking after the non-working population grow. “Negative population growth has an impact on the economy, and together with an ageing population, they won’t be able to afford to support the elderly,” said Xiujian Peng of Victoria University.

The Most Populous Cities in the World

The cities listed below are the most populous (人口稠密的) in the world, according to a 2018 U. N. report.

Tokyo, Japan

Population in Urban Area: 37,340,000

Population in City Area: 13,960,000

Tokyo is the most populated city in the world and the largest “Megacity” in the world.

The city called the “Capital of the East” is located on the eastern coast of the Japanese main island of Honshu.

Delhi, India

Population in Urban Area: 31,181,000

Population in City Area: 20,591,874

Delhi, also known as the National Capital Territory of India is the largest city in the country. According to a U. N. report, the Indian capital is expected to be the spot of the world’s second most populous city through at least 2030.

Shanghai, China

Population in Urban Area: 27,796,000

Population in City Area: 22,315,474

This is China’s most populated and also wealthiest city. Situated in the Yangtze River Delta, in eastern China, it has a huge business district, two large airports (Pudong and Hongqiao) and the world’s fastest train (the Shanghai Maglev).

Sao Paulo, Brazil

Population in Urban Area: 22,043,028

Population in City Area: 10,021,295

This busy metropolis (大都市) in southeast Brazil, is the largest city of the Southern Hemisphere (半球) and the largest Portuguese-speaking city in the world.

On November 15 in 2022, the United Nations (UN) reported that the number of people on Earth had grown to eight billion (8,000,000,000). That came just 11 years after the world reached seven billion people. The world faces challenges ahead as the population continues to grow.

The world’s population – the number of people on the planet – has grown rapidly over the last 200 years. In 1805, for the first time ever, the Earth had a billion people on it. It took over 100 years for that number to double to two billion. In less than 50 years, it had doubled again to four billion. Now, again in less than 50 years, the number has doubled once more to eight billion.

How fast local populations are growing depends a lot on where you are in the world. Typically, as countries become richer, their population growth slows. In some countries, like Japan, the number of people is actually shrinking. The greatest population growth these days is found in Asia and Africa.

Currently, China, with a population of 1.4 billion, is the country with the most people. That’s expected to change in the next year, when experts say India will pass China as the country with the world’s largest population. Other countries where rapid growth is expected through 2050 are the Democratic Republic of the Congo, Egypt, Ethiopia, Nigeria, Pakistan, the Philippines, and Tanzania.