Japanese high-school girls spend an average of seven hours a day on a mobile phone, news website RT reported, citing a survey.
As many as 10 percent of them spend up to a staggering 15 hours on the phone each day.
Boys, however, are a different story. They average up to about four hours on their phones, the poll by security firm Digital Arts found.
Of the 618 respondents between ages 10 and 18 who have their own phones, more than 40 percent of the girls averaged more than six hours a day, the survey, conducted online this month, found.
As they mature into adolescence, mobile phone owners also increase in number.
In Japanese high schools, over 95 percent of girls and 80 percent of boys own a mobile phone, a dramatic rise in usage from junior high school.
Digital Arts said the most popular activities include watching videos and chatting on social networks.
Half the respondents admit to using the phone while watching TV, eating meals and even while having a face-to-face conversation with another person.
“I think we will see a further increase in smartphone use while doing something else,” Miki Endo of Angels-eyes, a think tank that aims to combat internet addiction, told Asahi Shimbun.
“Many children feel bad about themselves, because they tend to procrastinate on what they should be doing, such as studying.”
In China, recent surveys have come out with data that compares addiction to mobile phones to addiction to cocaine or alcohol, AFP reported.
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