Effects of business games (BGs) on off-line have been investigated.. Research on the effects of BGs online has not been explained clearly with statistical support. Furthermore, BGs on the Internet have not adopted recent enterprise activities such as current price evaluations of stocks, or cash flow statement adapted to the business areas. This paper is provides an outline of BGs on the Internet, and to explain the construction of a BG system from another point of view. The recent enterprise activities mentioned above. And, support for a hypothesis obtained through causality analysis based on structural equation models clarifies the educational effect of an actual BG utilization using the Internet.