This paper alms to clear the present situation and problem of the signboards set up along Tokaido-Shinkansen between Tokyo and Shin-Osaka. The conclusions in this paper are as follows ; 1) A large number of signboards set up along the Shinkansen on the outskirts of the big city. And they are not in good condition on the landscape. 2) The social consensus has to be against setting up them. 3) The local governments have to pull down illegal signboards positively. 4) The sponsors have to take moral principles responsibility for their own signboards. 5) The advertising agency union has to keep under selfcontrol of setting up them.