My Knit Studio is in Seoul. I understand at one point it was the only yarn store in the city. Here is the contact info but a lot of yarns you would find available in the US etc. Do a check on the prices in terms of currency exchange

:
My Knit Studio
, Seoul , Korea (3F) 121 Kwan Hoon Dong. Tel: 822 722 0006

Web Site
www.myknit.com
Email:
myknit@myknit.com