Civics: Contemporary Society, Economy, and Politics
Civics: Contemporary Society, Economy, and Politics
This domain tests how Japan's Constitution and government work, and how economic choices affect households, firms, and public policy. Expect questions on separation of powers, elections, prices, taxes, social security, and contemporary issues such as aging.
Core rules and concepts
- The Constitution, effective in 1947, rests on popular sovereignty, fundamental human rights, and pacifism. The Emperor is a symbol without political power.
- The Diet is bicameral: House of Representatives and House of Councillors. The Cabinet governs with the confidence of the House of Representatives; courts exercise judicial review.
- Constitutional amendment requires a two-thirds majority in both houses and a majority in a national referendum.
- Local autonomy gives prefectures and municipalities separate responsibilities and local assemblies.
- In a market, prices coordinate supply and demand. Public goods are hard to provide through private markets because people cannot easily be excluded.
- Externalities occur when a cost or benefit falls on third parties. A factory's pollution is a negative externality; a subsidy for vaccination can address a positive one.
Worked example
A factory discharges waste into a river. Its private cost is low, but the social cost includes damage to fisheries and residents. Because the firm does not pay that damage, the market produces too much of the good. A Pigouvian tax equal to the external cost raises the firm's private cost toward the social cost, reducing output toward the socially efficient level. Regulation or tradable permits can also work, but the reasoning must identify the gap between private and social cost.
Traps that cost marks
Saying the Diet alone can amend the Constitution; confusing the Cabinet's power to dissolve the House of Representatives with judicial review; treating "market" as always efficient; and mixing percentage with percentage point. In policy questions, state who bears the cost and who receives the benefit.