http://otaku-pilgrimages.blogspot.jp/2012/06/hyouka-pilgrimage-to-hidatakayama.html
Economic effect of Hyouka is estimated 2.1 billion yen to Hida Takayama.
http://www.gifu-np.co.jp/news/kennai/20120801/201208010939_17674.shtml
The number of visitor for Hida Takayama increases more 500,000 than last year.
Local bank estimate economic effect of Hyouka as 2.1 billion yen (26 million dollar).
Hida High School is modeled for Kamiyama high school.
There is a cafe which Oreki and Chitanda met for real.