Abstract
In this study focused on the opportune time, kind of information, and personal attribute, a web-based survey was conducted for the purpose of acquiring basic knowledge which contributes to promotion of Car Sharing. Respondents were gathered from 51 cities in Japan. In order to comprehensive the effects of communication at the proper time and provision information, each respondent was given several situation, on the other hand among respondents information was provided in different ways. Finally, we found out that it might be the best to communicate with people when people want a vehicle moderately such as increasing another one.