Well the American (A) and Japanese (D) plugs are interchangeable.

Only difference is the "typical" Japanese plugs is non-polarized but both are available here in the USA. [Linked Image]

As far as Korea is concerned, you're just as likely to see (G) or (H) depending on the cordset the appliance manufacturer feels like using. Korean residential electrical service has two round-pin sockets, 220 volts at 60 cycles, Live-Live with no ground.

[This message has been edited by SvenNYC (edited 12-16-2004).]