God really seems to have it in for Japan at the moment.
A compilation video of yesterday's tornado, looking very much like footage we more commonly see from the middle of America, can be see here.
Of course, people interested in climate change will be curious as to how rare this is. As the Wikipedia knows all, it indicates that tornadoes are indeed pretty rare, but not unknown, in Japan. Other odd places that have had tornadoes on that list include Moscow in 1904. I guess that wherever you can get a storm, a tornado may be possible.