Obtaining a visa for business or work purposes for the Republic of Korea are quite straightforward, but the rules are tight. A visa is not required for most tourist, transit, or non-remunerative business stays up to 30 days. For longer stays for work, research, teaching, or extended family visits, longer-term work or other specified-purpose a visa must be obtained from a diplomatic mission in your home country prior to arrival in the Republic of Korea. To obtain a work visa, you must first obtain a work permit from your Korean employer.

This is just a sample of what you'll find in the complete Korea guide.