Artist, eromangaka. Formerly tagged as Satou Toshio.
Japanese name: 佐藤 登志雄 or 佐藤 登士雄 (Satou Toshio)
Circle name: 虚無の歌 (Kyomu no Uta)
https://www.pixiv.net/users/272621
https://www.pixiv.net/stacc/satoutoshio
https://x.com/satoutoshio01
https://x.com/i/user/87896904
https://pawoo.net/@nabenabeo
https://satoutoshio.fanbox.cc
https://www.pixiv.net/fanbox/creator/272621
https://sketch.pixiv.net/@satoutoshio
http://livedoor.blogimg.jp/satoutoshio1/imgs/1/e
http://blog.livedoor.jp/satoutoshio1
http://www008.upp.so-net.ne.jp/satoutoshio
http://doujinshi.mugimugi.org/browse/author/2894
http://doujinshi.mugimugi.org/browse/circle/765
http://twitpic.com/photos/satoutoshio01
