Blue colors:
- slow the pulse
- deepen breathing
- lower body temperature
- cause you to relax
East Japan Railway Co. has spent £100,000 fitting out all 29 stations on the capital's central train loop, the Yamanote Line, with the strong bulbs.
The operators believe they will emit a soothing glow, despite the absence of any scientific proof that the method reduces suicides.
Mizuki Takahashi, a therapist involved with the project, said: "We associate the colour with the sky and the sea.
"It has a calming effect on agitated people, or people obsessed with one particular thing, which in this case is committing suicide." Read on.