Peter's Japan blog

Japan seems to be filled with it: yellow bumpy lines, tiles with a grooves or dots. They are to be used as a guide for blind people. There are a few patterns that indicate different kind of obstacles like stairs, cross walk or cross sections. They can be found on the street, train stations, subway stations, ...

This pictures seems to be taken at the entrance to the subway in Narita Airport. As you can see there are several of these yellow lines here, that can guide blind people around and to the escalator.

Follow up:

More pictures of yellow lines:
Skyliner platform at Narita airport:

Subway platform in Yokohama:

wanted to use one of my own pictures, but it seems none of these yellow are visible in any of my pictures of Japan ;p so for now, I've used some pictures from http://www.pandagator.info/blog/.