URLs

• https://www.pixiv.net/users/1153024
• https://www.pixiv.net/stacc/kxgrou
• https://twitter.com/yamadakotaro
• https://twitter.com/intent/user?user_id=214488719
• https://sketch.pixiv.net/@kxgrou
• http://www.mangaupdates.com/authors.html?id=5316
• http://ja.wikipedia.org/wiki/山田孝太郎
• https://www.animenewsnetwork.com/encyclopedia/people.php?id=77343
• http://yamadakotaro.com
• http://doujinshi.mugimugi.org/browse/author/32070/Yamada-Koutarou
• http://p.twipple.jp/user/yamadakotaro