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Japan

Civil law with common-law influenceUnitary parliamentary constitutional monarchyReviewed· 2026-05-15
Capital
Tokyo
Population
123,500,000
Languages
Japanese
Currency
JPY

Japan · Government

Government and administration in Japan

How the executive, legislature and administrative state are organised, and which body is responsible for what.

The three branches

Head of State — The Emperor
Symbolic role with no governmental power.
Executive — Prime Minister and Cabinet
Designated by the Diet.
Legislative — National Diet: House of Representatives and House of Councillors
The lower house prevails on budget and treaties.
Judicial — Supreme Court and inferior courts
Administered by the General Secretariat.

How legislation is made

Most bills are Cabinet-sponsored, drafted by ministries and reviewed by the Cabinet Legislation Bureau, then passed by both houses; the lower house can override the upper by a two-thirds majority.

Enforcement institutions

Public Prosecutors Office
Highly selective charging practice and a very high conviction rate.
National Police Agency
Coordinates 47 prefectural police forces.
Japan Fair Trade Commission
Competition enforcement.

Government bodies and regulators

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