URLs

• https://www.pixiv.net/users/4620556
• https://www.pixiv.net/stacc/hotani0228
• https://twitter.com/hotani228
• https://twitter.com/intent/user?user_id=166526412
• https://sketch.pixiv.net/@hotani0228
• http://www.amazon.co.jp/保谷-伸/e/B00IQ8MF88/
• http://www.amazon.co.jp/保谷伸/e/B00J0CP2WA/
• http://www.mangaupdates.com/authors.html?id=20529
• http://www.zenyon.jp/lib/top.php?id=21
• http://p.twipple.jp/user/hotani228
• http://twitpic.com/photos/hotani228
• http://yfrog.com/user/hotani228/photos