Bulletin Board System has spread rapidly as the means of communication. However, these means has been misused as an irresponsible comment, a slander and defamation, devastation, the misunderstanding of the interpretation, harmful and wrong information, the delay of the reply, and the outflow of the private information. The countermeasure against these problems can think the participation system of the Internet by the real name. But, the participation system of the Internet by the real name has some problems. Because the real name system makes the reporting of their opinion openly difficult, the active participation becomes difficult
Therefore, this paper presents the type of participation and its effect of the Internet obtained from causality analysis based on structural equation models.