title: Blue Exorcist
context: The chapters of the Blue Exorcist manga series are written and illustrated by Kazue Kato and have been serialized by Shueisha in the monthly manga magazine Jump Square since April 2009.[7] The first tankōbon volume was released on August 4, 2009;[8] eighteen volumes have been released as of December 31, 2016.[9] The one-shot of the manga was first featured in the September 2008 issue of Jump Square and was titled Miyamauguisu House Case(深山鶯邸事件,Miyamauguisu-tei Jiken).[10]
question: When was Blue Exorcist published?
answers: August 4, 2009