Artist and eromangaka, whose signature gag is "I'm not so decent ('matomo' in Japanese)."
Japanese name: ヤツアシ マトモ (Yatsuashi Matomo)
Circle name: やつあし屋 (Yatsuashi-ya)
https://www.pixiv.net/users/4859259
https://www.pixiv.net/stacc/yatsuashimatomo
https://twitter.com/yatsuashimatomo
https://twitter.com/intent/user?user_id=754349845
https://seiga.nicovideo.jp/user/illust/37861323
https://www.nicovideo.jp/user/37861323
https://nijie.info/members.php?id=41322
https://sketch.pixiv.net/@yatsuashimatomo
http://yatsuashimatomo.blog.fc2.com
http://yatsuashiya.x.fc2.com
http://www.amazon.co.jp/s/?search-alias=books-jp&field-author=ヤツアシ+マトモ
http://www.dlsite.com/ecchi-eng/circle/profile/=/maker_id/RG16991.html
http://www.dlsite.com/maniax/circle/profile/=/maker_id/RG16991.html
http://b.dlsite.net/RG16991/
http://www.dmm.co.jp/dc/doujin/-/list/=/article=maker/id=29708/
http://enty.jp/yatsuashimatomo
http://skima.jp/u/id18143/