Artist, mangaka. The author of "Tenshi-chan to Akuma-kun.":http://www.amazon.co.jp/dp/4048660993/ 

Pen-name as a mangaka: 石坂 ケンタ (Ishizaka Kenta)
The other name: 軽
Circle name: OVER LIMIT

h4.See also

* Pixiv account: http://www.pixiv.net/member.php?id=520294
* Twitter account: http://twitter.com/ishiken02
* Twitpic account: http://twitpic.com/photos/ishiken02
* Mixi account: http://mixi.jp/show_friend.pl?id=526989
* Circle.ms: http://c10011165.circle.ms/oc/CircleProfile.aspx
* Amazon.co.jp: "http://www.amazon.co.jp/石坂ケンタ/e/B00IRK07DU/":http://www.amazon.co.jp/%E7%9F%B3%E5%9D%82%E3%82%B1%E3%83%B3%E3%82%BF/e/B00IRK07DU/ 
* Homepage (dead): http://m-afadf13e49e9dc00-m.cocolog-nifty.com/blog/
karu (ishiken)