Japan - Government Structure

Overview#

Japan is a parliamentary constitutional monarchy. The Emperor is a ceremonial head of state with no political power. The Prime Minister leads government through confidence in the House of Representatives (Shugiin), the lower chamber of the bicameral National Diet.

National Diet (Legislature)#

House of Representatives (Shugiin)#

• 465 seats allocated by Hare-quota PR across 8 regional constituencies
• 4-year terms, but can be dissolved by the PM for snap elections
• Invests confidence in the Cabinet - the PM must command a Shugiin majority
• Bills may originate in the Shūgiin, the Sangiin, or Cabinet review; the Shūgiin has override power over the Sangiin (2/3 supermajority)

House of Councillors (Sangiin)#

• 248 seats allocated by Hare-quota PR on staggered 6-year terms
• Half elected every 3 game years (2 classes, alternating)
• Cannot be dissolved - provides legislative continuity
• Revises and can reject legislation, but Shugiin override is available

Executive#

Prime Minister#

• Appointed via confidence vote in the Shugiin (lower house only)
• No fixed term - serves until losing confidence, resigning, or snap election
• Can dissolve the Shugiin and trigger snap elections (limit 2 per appointment, 336-turn cooldown)
• Appoints all Cabinet members directly (no Diet confirmation)

Emperor#

• Ceremonial head of state - Emperor Naruhito
• No political role in the game (NPP marked as retired)
• Represents constitutional continuity

Cabinet#

11 ministerial positions, each with metric responsibilities:

1. Chief Cabinet Secretary - governance, transparency, press relations
2. Minister of Finance - economy, employment, income
3. Minister of Foreign Affairs - GDP growth, international relations
4. Minister of Justice - judicial and legal affairs
5. Minister of Defense - public safety, national security
6. Minister of Economy, Trade and Industry - business formation, robotics
7. Minister of Health, Labour and Welfare - healthcare, elder care, work-life balance
8. Minister of Education, Culture, Sports, Science and Technology - test performance, workforce skill
9. Minister of Land, Infrastructure, Transport and Tourism - transport, disaster preparedness
10. Minister of the Environment - air quality, renewables, disaster preparedness
11. Minister of Internal Affairs and Communications - broadband, demographic decline, turnout

Cabinet Bills (Japan-specific mechanic)#

The PM or any Cabinet member can propose bills through Cabinet review before they enter the normal Diet pipeline. See japan-elections.md for the full cabinet bill lifecycle.

Regions#

8 game regions (each containing multiple prefectures):

Political Parties#

6 default parties:

• LDP (Liberal Democratic Party) - centre-right, dominant ruling party
• CDP (Constitutional Democratic Party) - centre-left, main opposition
• Komeito - centrist, LDP coalition partner (Soka Gakkai-aligned)
• JCP (Japanese Communist Party) - left-wing
• Nippon Ishin no Kai - neoliberal reform, Kansai stronghold
• DPFP (Democratic Party for the People) - centrist reformist

Regional Government#

Each of the 8 regions elects a Governor on a 4-year cycle and a Regional Council. A Prime Minister may appoint eligible Cabinet members seated in either the Shūgiin or the Sangiin.

Metrics#

Japan-specific regional metrics:

• elderCareQuality - elder care capacity (world's oldest population)
• naturalDisasterPreparedness - earthquake/tsunami/typhoon readiness
• transportEfficiency - Shinkansen and transit network quality
• workLifeBalance - overwork/karoshi index
• demographicDecline - birth rate trends, population aging
• roboticsAdoption - industrial and service robotics deployment

Central Bank#

Bank of Japan (BoJ) - Governor of the Bank of Japan, default prime rate 1.0%.

Stock Exchange#

Nikkei - displayed on the /country/jp/stockmarket page.