Although addiction to the Internet has been one of the serious social problems, surveys targeting high school students are neither qualitative nor quantitative enough. We conducted a web survey of 500 high school students and examined their status of the Internet addcition. As a result, 26.2% were diagnosed with high risk user group, 39.8% with potential risk user group, and 34.0% with general user. It has also been discovered that heavy users of the game seem to have some significant risk of falling into the addciton.
