Citizens from countries requiring a Korean visa are not permitted to board a flight or enter Korea without a visa. Passports must be valid for at least 6 months after the date foreseen for arrival in the Republic of Korea.
Visa Waiver Countries
Nationals of visa waiver countries can enter Korea without a visa as long as the purpose of their visit is tourism or temporary visit. If they wish to engage in profitable activities such as employment, they must apply for a Korean visa suitable for that purpose. To check whether you’re allowed to enter Korea without visa issuance, visit the following website: here