MADHOUSE, the studio behind series like Death Note and Vampire Hunter D, is producing the anime version of the CW series as part of a project for Warner Brothers.
According to the site Cinema Today, this is the first project by a Japanese studio based on foreign series.
Supernatural: the animation will be released on DVD and Blu Ray on January 12th, February 2nd and April 6th, 2011 respectively in Japan by Warner Home Video.
While animeanime.jp reports that the series will contain 22 episodes or OVAS that will cover the story of the first two seasons of the live action series, adding new scenes and original stories, as well as details of the Winchester brother's childhood.
Takahiro Yoshimatsu (Trigun) is in charge of character designs.
The seiyuus for the characters of Sam and Dean will be Yuya Uchida and Hiroki Touchi, the actors that did the Japanese dub for its broadcast in that country.