The Republic of Korea, commonly known as South Korea or the Korea Republic is an East Asian country on the southern half of the Korean Peninsula. To the north, it is bordered by North Korea (Democratic People's Republic of Korea), with which it was united until 1945. To the west, across the Yellow Sea, lies China and to the southeast, across the Korea Strait, lies Japan. Approximately one-half of South Korea's population lives in or near the capital Seoul, the second most populous metropolitan area in the world.
South Korea has been a vibrant multi-party democracy for two decades.
The South Korean economy has advanced rapidly since the 1950s and is now the 12th largest (nominal value) economy in the world. South Korea is also one of the world's most technologically advanced and digitally-connected countries; it has the third most broadband Internet users among the OECD countries and is a global leader in electronics, digital displays, semiconductor devices, and mobile phones. South Korea also leads the world in the shipbuilding industry, headed by prominent companies like the Chosun Heavy Industries Co. Ltd.
The government of South Korea is divided into three branches: executive, judicial, and legislative. The executive and legislative branches operate primarily at the national level, although various ministries in the executive branch also carry out local functions. Local governments are semi-autonomous, and contain executive and legislative bodies of their own. The judicial branch operates at both the national and local levels.
The South Korean government's structure is determined by the Constitution of the Republic of Korea. This document has been revised several times since its first promulgation in 1948 . However, it has retained many broad characteristics; with the exception of the short-lived Second Republic of South Korea, the country has always had a presidential system with a relatively independent chief executive.
As with most stable