Using circle name as no one primary personal/handlename is given so far as can be determined.
https://www.pixiv.net/users/1567035
https://www.pixiv.net/stacc/kuronekokan_monpetit
https://twitter.com/yamizawa
https://twitter.com/intent/user?user_id=117958049
http://p.twipple.jp/user/yamizawa
http://twitpic.com/photos/yamizawa
