Although perhaps less well-known than some of the other Sanrio characters (find a person who hasn't heard of Hello Kitty), even good old Pom Pom Purin is turning the grand age of 20 this year. To celebrate, events have been rolled out throughout the year, including a takeover of Shinjuku Station with an army of giant, fluffy Pom Pom Purins back in March. This time, it's Shibuya Station's turn for Halloween, with the train monument (known as Aogaeru or Green Frog) at Hachiko Square being Pom Pom Purin-fied for the occasion. From frog to dog, so to speak. Catch the Pom Pom train by November 1.