All international travellers must have an appropriate visa or entry permit (K-ETA).
What is K-ETA (Korean Electronic Travel Authorisation)
K-ETA is an electronic travel authorisation that visa-free foreign visitors need to obtain before entering the Republic of Korea. Purpose of travel should be tourism, visiting a family member, participating in events or meetings, or commercial business (visits where profit is derived are excluded).
Immigration, investment, labour, and everyday living to foreigners living in Korea or those that plan on coming to Korea.
On-line electronic processing of various applications that are needed for residence and employment
Provide investment related services to potential foreign investors. For example, gathering information about potential local partners, recommending local firms to investors (and visa versa), and various consulting services
Realisation of electronic government for foreigners that allows them to enjoy same level of privileges and conveniences as a Korean national.