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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 · Overview

The legal system of Japan

German-influenced codes from the Meiji era, overlaid after 1945 with American constitutional and procedural concepts. The result is a codified system with judicial review, a bill of rights and a lay-judge (saiban-in) element in serious criminal trials.

Legal tradition

Japan belongs to the civil law with common-law influence tradition. German-influenced codes from the Meiji era, overlaid after 1945 with American constitutional and procedural concepts. The result is a codified system with judicial review, a bill of rights and a lay-judge (saiban-in) element in serious criminal trials.

How power is divided

Parliamentary government with the Cabinet collectively responsible to the Diet, and a Supreme Court holding the final power of constitutional review.

Where law comes from

Constitution
Supreme law; Article 98 voids conflicting acts.
Six Codes (Roppō)
Constitution, Civil, Commercial, Criminal, Civil Procedure, Criminal Procedure.
Statutes of the Diet
Hōritsu enacted by the National Diet.
Cabinet and ministerial orders
Seirei and shōrei implementing statute.
Local ordinances
Jōrei of prefectures and municipalities.

The legal profession

Candidates pass the national bar examination, then complete a year at the Legal Training and Research Institute before qualifying as bengoshi, judge or prosecutor.

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