URLs

• https://www.pixiv.net/users/1141923
• https://www.pixiv.net/stacc/yutaka23
• https://twitter.com/yutaka23_
• https://twitter.com/intent/user?user_id=335846845
• https://sketch.pixiv.net/@yutaka23
• http://www3.wind.ne.jp/yutaka23/