Japan has done a tremendous amount of work in order to make it easier for the blind to walk around in the cities.
The yellow lines can be found on most sidewalks on the larger streets, and also along the paths and platforms in the subway stations. The yellow lines are bumpy, and they have a different structure close to crossings.
Loks like the blind people don't need to use the cane when they are walking on the yellow line. The just hold it in that air a bit in front of them
... but one thing that I can't understand is why Tokyo tower has signs for blind people. Do they go up there to see the view?