Overview
The state of Jin was a confederacy of statelets which occupied some portion of the southern Korean peninsula from the 4th to 2nd centuries BCE, bordering the Korean Kingdom of Gojoseon to the north. Its capital was somewhere south of the Han River. It preceded the Samhan confederacies, each of which claimed to be the successor of the Jin state.
Name
"Jin" is the Revised Romanization of Korean , originally written in Korean Chinese characters (hanja). This character's Old Chinese pronunciation has been reconstructed as and originally referred to the 5th earthly branch of the Chinese and Korean zodiacs, a division of the orbit of Jupiter identified with the dragon. This was associated with a bearing of 120° (between ESE and SE) but also with the two-hour period between 7 and 9 am, leading it to be associated with dawn and the direction east.
A variant romanization is Chin.
History
The degree of the organization of Jin as a formal political state is unclear. It seems likely that it was a federation of small states much like the subsequent Samhan. For the state to be able to contend with its contemporary Wiman Joseon and send embassies to the court of the Western Han dynasty, there was probably some level of stable central authority. Korean historian Ki-baek Lee (1984, p. 24) also suggests that the kingdom's attempt to open direct contacts "suggests a strong desire on the part of Chin [Jin] to enjoy the benefits of Chinese metal culture." However, for the most part Wiman Joseon prevented direct contact between Jin and China.
From Wikipedia (CC BY-SA 4.0).