A weekly anime series based on ' aired on Japan's TV Asahi on Thursdays at 2:40am from October 4, 2006 to March 14, 2007. The series lasted only 26 episodes. The complete series has been released on DVD in Region 2 format by Universal Entertainment Japan, including unaired episodes and uncensored content. The opening theme is by Rina Aiuchi while the ending themes are by doa and "Kissing Til I Die" by Jun Manaka.
The subsequent series Sōten no Ken: Re:Genesis series premiered on April 2, 2018 on Tokyo MX. The opening is "Souten no Hate ni" by AK-69 while the ending theme is "Inori no Hoshizora" by Sumire Uesaka. The second opening theme is "Soul Seeker" by Crossfaith while the ending theme is by Hiroya Ozaki.