Yutaro Fujii

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BBSs (Bulletin Board Systems) and Social Network Services (SNS) have been increasing in recenter years. In such systems, users can easily upload and share their own information via personal computers, and also cellular phones. However some information, such as adult content, is not appropriate for all users, notably children. Many SNS and BBS providing(More)
Many bulletin board systems and social network services have become popular collaboration tools in recent years. In such systems, users can easily upload and share their own information via personal computers and mobile phones. However, some information, such as adult content, is not appropriate for all users, notably children. Many SNS and BBS providers(More)
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