Artist, mangaka. Formerly tagged as 2215.
Father of Ninomae Mako and the author of Mako-san to Hachisuka-kun.
Creeparka was first created by this artist.
Pen-name: 221 (reading is given as ツツイチ, Tsutsuichi)
Fan-nickname: 2213 (Tsutsuichi-san)
Circle & site name: かりばにずむ (cannibalism)
https://www.pixiv.net/users/11048
https://www.pixiv.net/stacc/221
https://twitter.com/221EX
https://twitter.com/intent/user?user_id=18759727
https://seiga.nicovideo.jp/user/illust/1203361
http://com.nicovideo.jp/community/co374799
http://dic.nicovideo.jp/id/4800803
https://www.nicovideo.jp/user/1203361
https://pawoo.net/@221
https://pawoo.net/web/accounts/13241
https://tutuiti221.fanbox.cc
https://www.pixiv.net/fanbox/creator/11048
https://sketch.pixiv.net/@221
https://www.tinami.com/creator/profile/10458
http://amaraku.blog.fc2.com
http://mixi.jp/list_album.pl?id=8064320
http://mixi.jp/show_friend.pl?id=8064320
http://www.mangaupdates.com/authors.html?id=20275
http://f.hatena.ne.jp/ken221/
http://www.hatena.ne.jp/ken221/
http://cdn-ak.f.st-hatena.com/images/fotolife/k/ken221/
https://w3hidq06.fanbox.cc
http://p.twipple.jp/user/221ex
http://twitpic.com/photos/221ex
