Also, my friend Chris says Skype is the way to go to make free international calls. You can download it for free. I love free. And in case yer really crazy and think you actually want to pay to make that international call, here's how: http://www.howtocallabroad.com/south-korea/
Update: Not Haneda, Narita, and yeah, it's big too. At least their site is in English. Sweet.