Dok Do

The Dok Do also known as Liancourt Rocks in Korea. Sovereignty over the islets is disputed between Japan and South Korea. the islets are currently administered by South Korea, which has its Coast Guard stationed there. 
Both Korean and Japanese names have changed over time, a testament to the historical confusion over the subject which led to today's heated dispute. The Liancourt Rocks consist of two main islets and 35 smaller rocks. the total surface area of the islets is 0.18754 square kilometers with highest elecation of 169 metres found at an unnamed location on the west islet. A small Korean police detachment, administrative personnel, and lighthouse staffs are stationed in non-permanent supporting positions on the islets.

Although claimed by both Korea and Japan, Liancourt Rocks are currently administered by the Republic of Korea. Both nations' claims extend back at least several hundred years. Significant arguments supported by a variety of historical evidence have been presented by both parties, which have been challenged by counter0arguments with varying degrees of success.

Cyworld

Cyworld is a South Korean social network service like Facebook in United States. Members cultivate relationships by forming ilchon or friendship with each other through their minihopy which is own homepage to do anything
There is mini-room and we can decorateable, apartment-like spaces in an isometric projection also feature.
The Cy in Cyworld could mean cyber but is also a pun on the Korean workd for relationship between. Revenue is generated through the sale of acorns, which can then be used to purchase virtual goods, such as background music, pixelated furniture and virtual appliances.
Cyworld had a big effect on Korea’s Internet culture. Many renowned Korean socialites and celebrities possess Cyworld accounts. Cyworld launched in 1999 and became wildly popular in its home market with 2005 claims that practically every South Korean in their 20s and 25 percent of the total population of South Korea were users. By 2010 Cyworld had shuttered its operations in Germany, Japan and the United States. as of 2009, it continues to provide service to the Chinese and Vietnamese markets, where it has subscriber bases of seven million and 250,000 respectively.