wonder if u have figured this out already...
پوسٹڈ بايئ Sun Yoo انرر ساؤتھ کوریا فورم
But just in case u haven't, for foreigners living in Korea to send more than $50k, you need to report this amount and reason why you need to send it.
Document can be found at the bank - KEB and you'll need to bring income statement and proof of income tax payment. I believe that's all you'll need :)