Tourism numbers are looking really bad for japan, thanks to the ongoing nuclear disaster. Don’t let that stop you from taking a trip to Japan.
In fact, because of the huge drop in tourist money coming in, you’ll probably get some really good deals in the near future. Even the Japanese airlines will start making unbelievable deals. JAL just got out of bankruptcy and now they’re in trouble, again, because of the ongoing nuke crisis.
The nuke disaster is taking place in northern Honshu. The prevailing winds blow east of there, offshore to the Pacific. Think about visiting southern Honshu (south of Tokyo), and Shikoku & Kyushu. Their locations mean they will avoid most or all airborne (waterborne contamination might be an issue) radiation contamination from northern Honshu.
Also, they are least affected by power outages.
Not only could you get a good deal on a vacation to Japan, but your tourist money will really help Japan to recover.