URLs

• https://www.pixiv.net/users/136336
• https://www.pixiv.net/stacc/yakugaku
• https://twitter.com/yakugaku
• https://twitter.com/intent/user?user_id=11220782
• http://mixi.jp/show_profile.pl?id=5948297
• http://d.hatena.ne.jp/yakugakubu/
• http://twitpic.com/photos/yakugaku