Member of TYPE-MOON and main illustrator for Decoration Disorder Disconnection and Mahou Tsukai no Yoru. Often colors Takeuchi Takashi's artwork.
https://dic.pixiv.net/a/こやまひろかず
https://twitter.com/k_hiroriro
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https://dic.nicovideo.jp/a/こやまひろかず
https://dic.nicovideo.jp/id/786505
http://privatter.net/u/k_hiroriro
http://ja.wikipedia.org/wiki/こやまひろかず
https://myanimelist.net/people/6450
http://p.twipple.jp/user/k_hiroriro
http://twitpic.com/photos/k_hiroriro
