Japan is clearly getting serious about hosting the International Linear Collider, a planned 250+250 GeV (or later 500+500 GeV) electron-positron collider which could measure properties of the Higgs boson and perhaps other new things much more accurately than the LHC.
As the Symmetry Magazine informs us, two main candidate places in Japan recently released promotional video to defend their candidacies. It looks like the construction is a hot topic although it's expected to begin between 2015 and 2016 and collisions won't start before 2026.
This 4-minute music, choreography-based video featuring some famous actors and cartoons, among other real and virtual artists, is a reason why you should vote for the Sefuri mountains, Kyushu, Southern Japan [Facebook]. Big Ben's music and a short excerpt from Beethoven's fifth symphony – Japan has been crazy about Beethoven since the First World War – can't be absent in the video, either. Can you find it? You must have previously heard Asagohan (Breakfast), an amazing Japanese rendition of the symphony.
I will refer to this place as the "South". The competitors' promotional video couldn't be more different.
The Kitakami mountains in Tohoku, Northeastern Honshu [Facebook], have shot this 21-minute video featuring, among others, Hitoshi Murayama, a top Japanese particle phenomenologist from Berkeley (whom I met a few times).
It's a very serious, 21-minute educational video that isn't trying to be the coolest thing in the world. It's conceivable that only a small portion of the readers will watch the whole film.
I agree with you that it's unwise to choose the place according to some silly promotional videos only. Nevertheless, you're going to vote in a poll, anyway. Based on the films above and no other information: