Alarmed by a rise in people jumping to their deaths in front of trains, some railways are installing special blue lights above station platforms in the hope they will have a soothing effect and reduce suicides.
As of November, East Japan Railway Co. has put blue light-emitting diode lights in all 29 stations on the Yamanote Line, the central loop in Tokyo used by 8 million passengers each day.
There's no scientific proof the LED lights actually reduce suicides, and some experts are skeptical it will have any effect. But others say blue does have a calming effect.