Big Comic Spirits
Kayoko Shimotsuki wrote two manga adaptations of the series. The first, , adapts the first novel and was serialized in the publisher Shogakukan's "Big Comic Spirits" magazine from early 2009 to August 27, 2009, when it moved to "Monthly Big Comic Spirits". It was serialized until 2010, and collected into three "tankōbon" volumes released between August 28, 2009 and July 30, 2010. All volumes were made available in digital format on June 9, 2014. The second manga, adapting the film, was simply titled "Joker Game" and serialized in "Big Comic Spirits" between November 17, 2014 and January 19, 2015, the same day its sole "tankōbon" was published.