Here is an example of an address in Korea:
Royal Asiatic Society, Korea Branch
Room 611, Korean Christian Building 136-46
Jongno 5(o)-ga, Jongno-gu,
Seoul, SEOUL 100-470 Rep. of KOREA
Notice the format:
Name
Room, Building (Lot number, if known)
Ward, District
City, PROVINCE, Postal Code, Country
(Seoul is its own province, so the second Seoul in capitals can be omitted).
(Buildings are often identified the the number of the plot of land they sit on. Korea is moving toward a street number system, so this information will be good only until the end of the year. Then it will be the same as the US: Street number, street, ward, district, city, province, postal code, country).