ダイヤのA
"Ace of Diamond" is written and illustrated by Yuji Terajima. It was serialized in Kodansha's "Weekly Shōnen Magazine" from 15 May 2006 to 14 January 2015. Kodansha collected the chapters into forty-seven "tankōbon" volumes, published from 15 September 2006 to 17 August 2015.