Very little is publicly known about Ryu Mizunagi but the author's birthday is March 23rd. Originally from Aichi, Mizunagi won the Kodansha Four Seasons Manga Award in 2004 with the pilot for Witchcraft Works. Mizunagi was able to continue the project through Kodansha Japan in 2006.
"When I review Witchcraft Works, I don't usually talk about it enough, but the art in the series is phenomenal and it's really on display." --Adam Capps, Bento Byte