||The examples and perspective in this article may not represent a worldwide view of the subject. (December 2010)|
The judiciary (also known as the judicial system) is the system of courts that interprets and applies the law in the name of the state. The judiciary also provides a mechanism for the resolution of disputes. Under the doctrine of the separation of powers, the judiciary generally does not make law (that is, in a plenary fashion, which is the responsibility of the legislature) or enforce law (which is the responsibility of the executive), but rather interprets law and applies it to the facts of each case. This branch of the state is often tasked with ensuring equal justice under law. It usually consists of a court of final appeal (called the "Supreme court" or "Constitutional court"), together with lower courts.
In many jurisdictions the judicial branch has the power to change laws through the process of, judicial review. Courts with judicial review power may annul the laws and rules of the state when it finds them incompatible with a higher norm, such as primary legislation, the provisions of the constitution or international law. Judges constitute a critical force for interpretation and implementation of a constitution, thus de facto in common law countries creating the body of constitutional law.
In the US during recent decades the judiciary became active in economic issues related with economic rights established by constitution because "economics may provide insight into questions that bear on the proper legal interpretation". Since many countries with transitional political and economic systems continue treating their constitutions as abstract legal documents disengaged from the economic policy of the state, practice of judicial review of economic acts of executive and legislative branches have begun to grow.
In the 1980s, the Supreme Court of India for almost a decade had been encouraging public interest litigation on behalf of the poor and oppressed by using a very broad interpretation of several articles of the Indian Constitution.
Budget of the judiciary in many transitional and developing countries is almost completely controlled by the executive. The latter undermines the separation of powers, as it creates a critical financial dependence of the judiciary. The proper national wealth distribution including the government spending on the judiciary is subject of the constitutional economics. It is important to distinguish between the two methods of corruption of the judiciary: the state (through budget planning and various privileges), and the private.
The term "judiciary" is also used to refer collectively to the personnel, such as judges, magistrates and other adjudicators, who form the core of a judiciary (sometimes referred to as a "bench"), as well as the staffs who keep the system running smoothly.
After the French Revolution, lawmakers stopped interpretation of law by judges, and the legislature was the only body permitted to interpret the law; this prohibition was later overturned by the Code Napoléon.
In civil law jurisdictions at present, judges interpret the law to about the same extent as in common law jurisdictions – however it is different than the common law tradition which directly recognizes the limited power to make law. For instance, in France, the jurisprudence constante of the Court of Cassation or the Council of State is equivalent in practice with case law. However, the Louisiana Supreme Court notes the principal difference between the two legal doctrines: a single court decision can provide sufficient foundation for the common law doctrine of stare decisis, however, "a series of adjudicated cases, all in accord, form the basis for jurisprudence constante."  Moreover, the Louisiana Court of Appeals has explicitly noted that jurisprudence constante is merely a secondary source of law, which cannot be authoritative and does not rise to the level of stare decisis. 
Various functions 
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- In common law jurisdictions, courts interpret law, including constitutions, statutes, and regulations. They also make law (but in a limited sense, limited to the facts of particular cases) based upon prior case law in areas where the legislature has not made law. For instance, the tort of negligence is not derived from statute law in most common law jurisdictions. The term common law refers to this kind of law.
- In civil law jurisdictions, courts interpret the law, but are prohibited from creating law, and thus do not issue rulings more general than the actual case to be judged. Jurisprudence plays a similar role to case law.
- In the United States court system, the Supreme Court is the final authority on the interpretation of the federal Constitution and all statutes and regulations created pursuant to it, as well as the constitutionality of the various state laws; in the US federal court system, federal cases are tried in trial courts, known as the US district courts, followed by appellate courts and then the Supreme Court. State courts, which try 98% of litigation, may have different names and organization; trial courts may be called "courts of common plea", appellate courts "superior courts" or "commonwealth courts". The judicial system, whether state or federal, begins with a court of first instance, is appealed to an appellate court, and then ends at the court of last resort.
- In France, the final authority on the interpretation of the law is the Council of State for administrative cases, and the Court of Cassation for civil and criminal cases.
- In the People's Republic of China, the final authority on the interpretation of the law is the National People's Congress.
- Other countries such as Argentina have mixed systems that include lower courts, appeals courts, a cassation court (for criminal law) and a Supreme Court. In this system the Supreme Court is always the final authority, but criminal cases have four stages, one more than civil law does. On the court sits a total of nine justices. This number has been changed several times.
Judicial Systems 
Japan’s process for selecting Judges is longer and more stringent than the process in the United States and in Mexico. Assistant judges are appointed from those who have completed their training at the "Legal Training and Research Institute" located in Wako City. Once appointed, assistant judges still may not qualify to sit alone until they have served for five years, and have been appointed by the Supreme Court. Judges require ten years of experience in practical affairs, public prosecutor, or practicing attorney. In the Japanese Judicial Branch there is the Supreme Court located in Japan, eight high courts, fifty district courts, fifty family courts, and 438 summary courts. In difference, Mexican Supreme Court Justices are appointed by the president, and then are approved by the Senate to serve for a life term. Other justices are appointed by the Supreme Court and serve for six years. Federal courts consist of the Supreme Court with 21 magistrates, 32 circuit tribunals and 98 district courts. The Supreme Court of Mexico is located in "Mexico City. Supreme Court Judges must be of ages 35 to 65 and hold a law degree during the five years preceding their nomination. In the United States Supreme Court, justices are appointed by the president and approved by the Senate. As in Mexico, justices serve for a life term or until retirement. The Supreme Court of the United States is located in "Washington D.C". The Federal court system consists of 94 federal judicial districts. The 94 districts are then divided into twelve regional circuits. The United States consist of five different types of courts that are considered subordinate to the Supreme Court, U.S bankruptcy courts, U.S Courts of Appeal for the federal circuit, U.S Court of International Trade, U.S Courts of Appeal, and U.S District Courts.
See also 
- Bench (law)
- Constitutional economics
- Judicial independence
- Judicial review
- Rule According to Higher Law
- Rule of law
Further reading 
- Cardozo, Benjamin N. (1998). The Nature of the Judicial Process. New Haven: Yale University Press.
- Feinberg, Kenneth, Jack Kress, Gary McDowell, and Warren E. Burger (1986). The High Cost and Effect of Litigation, 3 vols.
- Frank, Jerome (1985). Law and the Modern Mind. Birmingham, AL: Legal Classics Library.
- Levi, Edward H. (1949) An Introduction to Legal Reasoning. Chicago: University of Chicago Press.
- Marshall, Thurgood (2001). Thurgood Marshall: His Speeches, Writings, Arguments, Opinions and Reminiscences. Chicago: Lawrence Hill Books.
- McCloskey, Robert G., and Sanford Levinson (2005). The American Supreme Court, 4th ed. Chicago: University of Chicago Press.
- Miller, Arthur S. (1985). Politics, Democracy and the Supreme Court: Essays on the Future of Constitutional Theory. Westport, CT: Greenwood Press.
- Tribe, Laurence (1985). God Save This Honorable Court: How the Choice of Supreme Court Justices Shapes Our History. New York: Random House.
- Zelermyer, William (1977). The Legal System in Operation. St. Paul, MN: West Publishing.
- Hamilton, Marci. God vs. the Gavel, page 296 (Cambridge University Press 2005): “The symbol of the judicial system, seen in courtrooms throughout the United States, is blindfolded Lady Justice.”
- Fabri, Marco. The challenge of chanf for judicial systems, page 137 (IOS Press 2000): “the judicial system is intended to be apolitical, its symbol being that of a blindfolded Lady Justice holding balanced scales.”
- Posner R. The Constitution as an Economic Document. The George Washington Law Review, November 1982, Vol. 56. No. 1
- Jeremy Cooper, Poverty and Constitutional Justice, in Philosophy of Law: Classic and Contemporary Readings, edited by Larry May and Jeff Brown, Wiley-Blackwell, UK, 2010.
- Barenboim, Peter (October 2009). Defining the rules. Issue 90. The European Lawyer.
- Cappelletti, Mauro et al. The Italian Legal System, page 150 (Stanford University Press 1967).
- Willis-Knighton Med. Ctr. v. Caddo-Shreveport Sales & Use Tax Comm'n., 903 So.2d 1071, at n.17 (La. 2005). (Opinion no. 2004-C-0473)
- Royal v. Cook,, 984 So.2d 156 (La. Ct. App. 2008).
- American Bar Association (2004). How the Legal System Works: The Structure of the Court System, State and Federal Courts. In ABA Family Legal Guide.
- The American Legal System.
- Public Services Department. "Introduction to the Courth system". Syracuse University College of Law.
- Mosleh, Peter. "Japan's Judiciary". Southern Methodist University. Retrieved April 20, 2013.
- "The Japanese Judicial System". Retrieved April 20, 2013.
- "Mexico-Judicial Legislative". Retrieved April 20, 2013.
- "The Judicial Branch". The White House. Retrieved April 20, 2013.
- "Federal Courts". Retrieved April 20, 2013.
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