Animenation is reporting that the Japanese Monthly Shonen Jump Magazine has announced the production of an anime series based on Norihiro Yagi's Claymore manga, which is published in the U.S. by Viz Media.  The on-going Claymore manga series has reached ten volumes in Japan, where its medieval-type fantasy story about a society where demons (called yoma) live undetected but feed on humans unless their evil designs thwarted by a group of skilled warriors known as Claymores, because of the giant swords they wield.