Stamps that make trainstations fun

There are a total of 77 stamps for each of the JR (Japan Railroad) stations in Tokyo.
The title of this poster reads:"駅の数だけドラマがある。スタンプも、ある" (There are as many drama as the number of stations, also stamps)
From time to time, many companies, including railroad companies, organize compains of "Stamp Rally" (スタンプラリー), in which people are give maps of stamp station and a book for stamping on. It helps people to go through as many places as the sponsor wish. It works especially well for products that involve family in anyway.