My wife is Korean and the Korean Family history that they have is actually printed in chinese letters. When my wife came to the US, she had to get her parents & grandparents names translated from the Chinese into English. This was done in Korea and the translator also wrote the parents and grandparents names in Korean.
You may want to see if your grandmother had her family history translated or with her possesions and try and get it translated. Also if there is any immigration paperwork, that may help too or if there are any living realives of hers, see if they can help you.Best of luck.