Manga Artist.
Japanese name: 東谷文仁
https://www.pixiv.net/users/597774
https://www.pixiv.net/stacc/long-tail
https://twitter.com/487keron
https://twitter.com/FHigashitanibot
https://twitter.com/intent/user?user_id=163052216
https://twitter.com/intent/user?user_id=922663460
https://pawoo.net/@long_tail
https://pawoo.net/web/accounts/640048
https://sketch.pixiv.net/@long-tail