Tokyo Cosplay Collection -A0-
Cloud computing is attracting attentions of people of a wide variety of fields including users, service providers and facility manufacturers. From the users' point of view, the most attractive advantages of cloud computing must be the ubiquity and affordability of services that cloud computing can realize. Since cloud computing is constructed on top of the Internet, users can take advantage of services anytime and anywhere. The recent rapid sp-read of mobile computing certainly enhances the demands for the ubiquity of service provision.