From the article: "In June and July, when The Yomiuri Shimbun carried a series of articles featuring the effects of video games on children in our lifestyle news pages, we received more than 150 letters from readers who said they were worried about their children being addicted to video games. Reading the letters, I realized that video games can present parents with serious problems.
In a survey conducted last summer by Goo Research via its Website for primary school students, about 80 per cent of respondents who were primary school students said they played video games.
Among the respondents, 30 per cent of boys said they played for more than three hours a day. According to the survey, while some families had rules for playing video games, including a limit on the amount of time spent playing, 35 per cent of families had no special rules."