slingbox is a box you hook up to your tv (cable/satellite/whatever) and to your network connection. After you hook it up in, say, D.C., you can watch local DC programming (local news, nats games, skins games, wizards, etc) anywhere in the world that has a internet connection (including japan, and everywhere else).
url:
Sling Media :: Sling What?
sold at best buy and just about everywhere else.