When does Kekkaishi return?

Kekkaishi is a Japanese manga series written and illustrated by Yellow Tanabe. It was serialized in Shogakukan's sh?nen manga magazine Weekly Sh?nen Sunday from October 2003 to April 2011. A 52-episode anime television series adaptation was broadcast from October 2006 to February 2008. Both manga and anime series have been licensed for English release in North America by Viz Media.