| Country | Judicial branch |
| Ireland | Supreme Court (judges appointed by the president on the advice of the prime minister and cabinet) |
| Isle of Man | High Court of Justice (justices are appointed by the Lord Chancellor of England on the nomination of the lieutenant governor) |
| Israel | Supreme Court (justices appointed by Judicial Selection Committee - made up of all three branches of the government; mandatory retirement age is 70) |
| Italy | Constitutional Court or Corte Costituzionale (composed of 15 judges: one-third appointed by the president, one-third elected by Parliament, one-third elected by the ordinary and administrative Supreme Courts) |
| Jamaica | Supreme Court (judges appointed by the governor general on the advice of the prime minister); Court of Appeal; Privy Council in UK; member of the Caribbean Court of Justice (CCJ) |
| Jan Mayen | void |
| Japan | Supreme Court (chief justice is appointed by the monarch after designation by the cabinet; all other justices are appointed by the cabinet) |
| Jersey | Royal Court (judges elected by an electoral college and the bailiff) |
| Jordan | Court of Cassation (Supreme Court) |
| Kazakhstan | Supreme Court (44 members); Constitutional Council (seven members) |
| Kenya | Court of Appeal (chief justice is appointed by the president); High Court |
| Kiribati | Court of Appeal; High Court; 26 Magistrates' courts; judges at all levels are appointed by the president |
| Korea, North | Central Court (judges are elected by the Supreme People's Assembly) |
| Korea, South | Supreme Court (justices appointed by the president with consent of National Assembly); Constitutional Court (justices appointed by the president based partly on nominations by National Assembly and Chief Justice of the court) |
| Kosovo | Supreme Court; district courts; municipal courts note: the Kosovo Constitution dictates that the Supreme Court of Kosovo is the highest judicial authority, and provides for a Kosovo Judicial Council (KJC) that proposes to the president candidates for appointment or reappointment as judges and prosecutors; the KJC is also responsible for decisions on the promotion and transfer of judges and disciplinary proceedings against judges; at least 15 percent of Supreme Court and district court judges shall be from non-majority communities |
| Kuwait | High Court of Appeal |