i am an american soldier in Korea

I am an american soldier in Korea, but I will be taking a vacation in Japan. I live on an Army base in Korea. I read some of the prior questions asked and I understand you do not deliver to PO boxes but would you deliver to a military building where people work and could my co workers or some one in my chain of command sign for the pass for me. By the way we have a FedEx place here on post also. Another option I have been looking at is that I could have it sent to my Korean girlfriend house but could she sign for it and would you mail it to a Korean address and I am sure the address needs to be in Hangul . Please give me some advise and let me know what I need to do.