I hope that you're not serious. It's darn near impossible to get usable amounts of energy from the midwest to the east coast, due to line losses and lack of usable transmission lines. The idea that you could get much usable power trans-oceanac is laughable. Transmission lines that long would cost a fortune and wouldn't deliver enough energy to light your Christmas lights. Not to mention the enviromental squabbles over sending megavoltage range power into the depths of the sea.
But for problems with this idea,line losses are the most vexing. Power lines lose energy to heat and lessen the usable power at the other end. The longer the line, the more energy you lose to this thief called resistance.
Now if we can come up with a usable superconducting transmission line you may be able to remove your tongue from your cheek and start negotiations with the Japanese.
As a side note, Japan is currently in their own electric power crisis, so your plea may fall on deaf ears.