Artist, mangaka. Formerly tagged as macchi.
Pen-name: 服部 マサヒコ (Hattori Masahiko)
The other name: match (マッチ)
Circle & site name: 20twenty
https://www.pixiv.net/users/157342
https://www.pixiv.net/stacc/20twenty
https://twitter.com/ninjamatch
https://twitter.com/intent/user?user_id=1178959052
https://seiga.nicovideo.jp/user/illust/552028
https://www.nicovideo.jp/user/552028
https://pawoo.net/@20twenty
https://pawoo.net/web/accounts/418466
https://ninjamatch.fanbox.cc
https://sketch.pixiv.net/@20twenty
https://20ttwenty.tumblr.com
https://match-c.tumblr.com
https://matchtwenty.tumblr.com
https://ninjamatch-c.tumblr.com
https://ninjamatch.tumblr.com
http://match20.blog.fc2.com
http://webcatalog.circle.ms/Perma/Circle/10086264
http://photozou.jp/photo/top/920120
http://twitpic.com/photos/ma20tch
http://twitpic.com/photos/ninjamatch