Which country has a non-hereditary elective monarchy?

One example of a country with a non-hereditary elective monarchy is Malaysia. Malaysia operates under a unique system known as a constitutional monarchy, where the monarch is elected from among the traditional rulers of the nine Malay states. These traditional rulers, known as Sultans, take turns serving as the Yang di-Pertuan Agong, or King, for a five-year term. The selection process follows a rotational system based on seniority among the Sultans. While the position of King is not hereditary, it is elective and rotates among the Sultans, providing each state with an opportunity to have its ruler serve as the head of state at some point.