URLs

• https://www.pixiv.net/users/51362
• https://www.pixiv.net/stacc/takamasa
• https://twitter.com/systemheaven
• https://twitter.com/intent/user?user_id=69084944
• https://sketch.pixiv.net/@takamasa
• https://www.instagram.com/takamuramasaya/
• http://systemheaven.com
• http://takamasablog.systemheaven.com
• http://p.twipple.jp/user/systemheaven
• http://twitpic.com/photos/systemheaven