*1 Literary and portrait piracy is included as well. Besides sites that contain information on setting off and promoting illegal acts, are included. Moreover contents, that are questionable illegal as well as obvious illegal, are included. Further these sites are included, such as fishing Web sites that are obviously related to frauds, and dating Web sites that violate laws on regulation of dating Web sites.
*2 The contents, that are questionable illegal as well as obvious illegal, are included. It is also targeted, how to cultivate drugs, information on places and experiences of drugs on abroad.
*3 Hobbies concerning weapons are included, such as model guns, knives, purchase and collecting of survival games, etc.
*4 Sites which contain advocacies and information on improving and promoting improper acts that are not generally accepted by society, such as selling personal information, etc.
*5 Virus-infected sites that site owners are not aware of infections are included.
*6 Images in news articles, like links to an unexpected browsing that causes unpleasant and disgusted feeling, are registered to URL filtering database on some occasions.
*7 Redirect and affiliate sites are mainly registered on URL filtering database. Sites that are categorized into illegal, adult contents, dating, etc, are registered as each category. It does not mean that this service stops receiving junk mails. Besides this service does not prohibit browsing all sites that are in junk mails.