In Japan, halloween business has been heating up and is a social phenomena.
November 2011 to September 2014, transition of total sales of ”Yahoo!Shopping” shows that sales in September and October grow by over 130% by year by year.
The number of searches of ”Christmas”, ”Valentine” and “Halloween” in “Yahoo!Searching” shows that “Christmas” and “Valentine” grow by about 120% by year, but “Halloween” do by about 150% by year.
Now, halloween has become a national event in Japan. I think that it is useful for understanding other culture and Japanese economy.