The trend has even acquired a name "Aruki Sumaho" - or smartphone walking - and has reached such levels that phone companies have reportedly joined forces with railway operators and the government to tackle the problem. Japan's largest mobile network NTT Docomo erected a sign on a staircase at one of Tokyo's main stations, Shinjuku, which reads: "Walking while using a smartphone is dangerous... But those people probably didn't see this announcement." According to the Mainichi Daily News , the latest yearly figures show 18 people fell off platforms while using phones, while 60% of people who took part in a survey said they'd been walked into by somebody using a smartphone.