Can I get a permanent residence visa in south korea if I stayed in a korean university for 4 years and graduated?

Yes, it is possible to apply for a permanent residence visa in South Korea if you have stayed in the country for 4 years as a student and have graduated from a Korean university. However, there are certain requirements and criteria that you must meet in order to be eligible for a permanent residence visa. It is recommended that you consult with the relevant immigration authorities or a legal professional for more information on the application process and requirements.

The answer is: No

According to South Korea's immigration laws, graduating from a Korean university for four years does not automatically qualify for permanent residence. To obtain permanent residency, foreign graduates need to meet specific requirements, such as exceptional contributions to the Korean economy or society, or securing a job in a field that is in high demand in South Korea.