LEGEND OF THE MILLENNIUM DRAGON is based on a novel by Takafumi Takada. The voice cast includes Ryuji Aigase, Satomi Ishihara and Kentarô Itô.
Synopsis (via IMDb): A 15-year-old boy goes 1200 years back in time to find his unlikely destiny as the savior to end the war between humans and demons.
You can check out the English-subtitled trailer below.