i remember reading that post some time ago. Places like Korea and Japan, you have to treat like New York City, and not make it obvious if you are carry any kind of knife, and as far as owning, it's not something you want blatantly known.
Every summer that i've gone back i've brought a couple of my edc's and a fixed blade for when i go hiking in the mountains. And one time i had bought my father some kitchen cutlery. I've not had a problem having them in my check in, and the one time i sent my gf a knife. Military address would be safer, but again, just don't have it blatant that you're shipping a knife(ves) to korea, or owning one while there.
Los Angeles- if you haven't sent the knife yet, i could help you in bringing it there. I'm travelling there again in 3 weeks, and i can just pack it up in my check in with my others. If you're interested you can pm me. I'm driving up to LAX this sat to pick up a friend as well. cheers