In this paper, we will discuss Internet user's self-responsibility(ziko-sekinin). A main purpose is to clear the reason why we need self-responsibility in Internet. We survey some articles about responsibility in Internet on newspapers from 2003 to 2012 and analyze them from a content analysis. In conclusion, responsibility in Internet is needed as fundamental premise to guarantee security of the Internet in social responsibility rather than as norm consciousness that someone who created disadvantages in Internet should take over them.