What is the poorest region in South Korea?

Could you please elaborate on the topic of the poorest region in South Korea? Is there a particular aspect you would like me to focus on, such as economic indicators, social factors, or geographical location? It's important to understand that poverty can manifest in various forms and may not always be directly tied to a specific region, but rather a combination of socioeconomic factors. Nonetheless, I'm curious to know if there's a particular region that is commonly recognized as being economically disadvantaged in South Korea, and what are the contributing factors to this situation.