What other population issue is Japan facing?

• A. Immigration surge over naturalization
• B. Aging population and declining birth rates leading to labor shortages and economic sustainability
• C. Rapid population growth causing resource strain
• D. Complete population stability with no change

Answer: (B)

The main issue being tested is Japan’s population dynamics, specifically the together effect of an aging society and a low birth rate. Japan has kept birth rates well below what’s needed to replace the population, while life expectancy stays high. That combination pushes a larger share of people into old age and reduces the number of people in the labor force. The result is labor shortages across many sectors and growing pressure on pension and healthcare systems, which raises questions about long-term economic sustainability.

That’s why this description best fits the situation: aging and declining birth rates create the worker shortages and economic pressures Japan is worried about. By contrast, a surge in immigration leading to rapid naturalization isn’t the defining trend Japan has seen, and population growth isn’t rapid—it's more a story of stabilization or decline rather than expansion. A scenario of complete population stability with no change doesn’t reflect the ongoing shift toward an older, shrinking population.