In the north east Asian countries of Japan and South Korea, the carrying of an umbrella is a vital tool come rain or shine. Either to keep the rain off, or the sun from beating down on you, umbrellas are carried everywhere. So the idea of reminding people to take their umbrellas isn't such a strange thing. Despite the message that these posters give off. Looking into them more deeply, explains that maybe Japanese culture isn't quite as weird as it may appear on the surface. For example, the random Marilyn Monroe poster, is a play on words. The text in the top right corner "Kaerazaru kasa" (umbrella of no return) is a play on "Kaerazaru Kawa," the Japanese title for "River of No Return," the 1954 movie starring Monroe. The Jesus image, reads at the top "Wishing to God again and again". The poster makes a play on the words "kasa" (umbrella) and "kasane-gasane" (again and again). A little bit of insight into graphic design choices and public information posters? Do you really care?