Courts and Judiciary in Japan

📅 July 7, 2026 📖 909 words 📂 courts-and-judiciary japan

Overview of the Japanese Court System

Japan’s judiciary is established under the Court Act (Saibansho Ho, Law No. 59 of 1947), enacted as part of the post-WWII reforms accompanying the 1947 Constitution. The pre-war judiciary operated under the Meiji Constitution, which placed courts under the Ministry of Justice and denied constitutional review. The 1947 Constitution transformed the judiciary into an independent branch and conferred on the Supreme Court the power of judicial review (Article 81). The court system is unified — there is no separate system of administrative courts.

The Supreme Court

The Supreme Court (Saikō Saibansho) is composed of 15 justices appointed by the Cabinet. The Chief Justice is appointed by the Emperor upon Cabinet designation; the 14 Associate Justices are appointed by the Cabinet and attested by the Emperor. Justices are subject to popular review (kokumin shinsa) at the first general election following appointment and every ten years thereafter (Article 79, Constitution); no justice has ever been removed through this process.

The Court operates through three Petty Benches (Shōhōtei, five justices each) for most appeals, and a Grand Bench (Daihōtei, all 15 justices) for constitutional questions and cases overruling prior precedent. Notable Grand Bench decisions include Matsumoto Jiken (1973, equal protection), the Hakata Station Film Case (1969, press freedom), and the Sadaichi Otsuka Case (1993, electoral malapportionment). Appeals to the Supreme Court are limited to constitutional questions and inconsistency with precedent; the Court may also grant discretionary review for significant issues of statutory interpretation.

Lower Courts

High Courts (Kōtō Saibansho) — Eight High Courts sit in Tokyo, Osaka, Nagoya, Sapporo, Sendai, Hiroshima, Takamatsu, and Fukuoka. They hear appeals from District and Family Courts and have original jurisdiction over certain administrative and intellectual property cases (the Intellectual Property High Court, established 2005, is a specialised branch of the Tokyo High Court).

District Courts (Chihō Saibansho) — Fifty District Courts (one per prefecture) serve as first-instance courts for most civil and criminal cases. A single judge hears routine cases; a three-judge panel hears serious criminal cases and constitutional issues.

Family Courts (Katei Saibansho) — Fifty Family Courts handle domestic relations and juvenile delinquency cases. Proceedings are closed and emphasise conciliation (chōtei). Investigative officers conduct social investigations.

Summary Courts (Kan’i Saibansho) — 438 Summary Courts handle small civil claims (up to ¥1.4 million) and minor criminal offences. Judges need not be qualified legal professionals.

The Saiban-in System

The Saiban-in System (Lay Judge System, effective May 2009) requires six lay judges selected from voter rolls to sit with three professional judges for serious criminal cases (those punishable by death or life imprisonment, or where the victim has died). Verdicts and sentences are reached by a majority vote that must include at least one professional and one lay judge. Approximately 1,500–2,000 saiban-in trials occur annually. The system has enhanced public participation but raises concerns about the burden on lay participants and the risk of professional dominance.

Judicial Administration

The Supreme Court Secretariat (Saikō Saibansho Jimu Sōkyoku) exercises extensive administrative authority over the judiciary, controlling judicial assignments, budgets, training, and legislative proposals. Critics describe it as an unaccountable “judicial bureaucracy” that discourages independence: judges who issue controversial rulings may face unfavourable postings. The 2001 Judicial Reform Council recommended greater transparency, but progress has been incremental.

The Career Judiciary

Japan maintains a career judiciary recruited through the two-year Legal Training and Research Institute (Shihō Kenshūjo). Judges are systematically rotated every 2–3 years across different courts and locations — a practice justified as ensuring uniform quality but criticised for fragmenting expertise. Approximately 3,800 judges serve a population of 125 million, and a district court judge may carry 300–400 civil cases at any time.

The 2001 Judicial Reform Council

The Judicial Reform Council (1999–2001) identified three reform pillars: (1) doubling the number of lawyers to 50,000 by 2018 (a target achieved); (2) introducing the saiban-in system; and (3) establishing professional law schools (hōka daigaku-in) in 2004. Results have been mixed: law school enrolments have declined sharply since 2010, several schools have closed, and the bar exam pass rate remains low (approximately 25–30%).

Constitutional Review in Practice

Article 81 empowers the Supreme Court to determine the constitutionality of laws and official acts. Japanese courts have exercised this power with extreme restraint. Before 2000, the Supreme Court held a statute unconstitutional only three times. Post-2000 decisions include the Postal Savings Case (2005) and the Foreigner Suffrage Cases (2007, upholding the exclusion of permanent residents from national voting). Key cases include:

The Sony Case (1969) — Narrow interpretation of freedom of assembly
The Eniwa Case (Sapporo District Court, 1967) — Rare acquittal under the Self-Defence Forces Law, later reversed
The Kokichi Irie Case (1950) — Established the “clear and present danger” test for speech
The Otsuka Apportionment Cases (1976–present) — Repeatedly finding malapportionment ratios exceeding 2:1 unconstitutional but declining to invalidate elections

This restraint is attributed to the career judiciary’s deference culture, the Secretariat’s control over assignments, and the post-war political settlement favouring judicial restraint.

Relevant Legislation

Constitution of Japan (1947)
Court Act (Saibansho Ho), Law No. 59 of 1947
Act on Criminal Cases Subject to the Participation of Saiban-in, Law No. 63 of 2004
Judicial Reform Council Report (2001)