kotsuka
Artist.
Japanese name: コツカ
Circle: 少年舎
Circle member: U's, コウキ, 鷹寛, 小渕 恵一
See also
* Pixiv account: http://www.pixiv.net/member.php?id=475173
* Circle profile: http://c10008405.circle.ms/oc/CircleProfile.aspx
* Circle homepage: http://shounensha.web.fc2.com/
* Circle blog: http://shounensha.blog88.fc2.com/