Originally Posted by mosburger
Jeju has had two major visitor groups since ages, Korean honeymooners and Korean and Japanese male bonding groups coming for Golf, hunting and more nocturnal pleasures. Now they are ( fortunately ) going upmarket and aiming at individual travellers too instead of just the package tour buyers. With Japanese and some basic Korean you should be able to enjoy the Island to a considerable extent although I think you would cherish your trip more if accompanied by a fluent Korean speaker.
I don't doubt it, but at the moment I don't know any Koreans, and calling my nonexistent Korean "basic" would be unwarranted high praise. But thanks for the info, I figure even sign language will suffice in a pinch for getting up Mt. Halla