No one seems sure how this mania began but the walls and ceiling of the Kofuku Station in Hokkaido, Japan are covered with business cards and notes posted by visitors. The collection is so profound that it has become a major tourist attraction in the area. People now travel from far and wide to post their wishes and of course business cards. The station building will be temporarily closed for renovation but the new Japanese “Happiness Station” will continue the tradition by providing a place to post business cards.

http://ajw.asahi.com/article/behind_news/AJ201308310054