Haganai
The first "Boku wa Tomodachi ga Sukunai" manga series, written and illustrated by Itachi, has been published in Media Factory's "Monthly Comic Alive" magazine since its May 2010 issue, released on March 27, 2010. Additionally, the series has been collected in 14 "tankōbon" volumes. Seven Seas Entertainment has licensed the first manga series in North America under the title "Haganai: I Don't Have Many Friends".
Tobaku Haōden Zero
Nobuyuki Fukumoto began "Tobaku Haōden Zero" in Kodansha's "Weekly Shōnen Magazine" on September 19, 2007 and finished on March 11, 2009. The first part was compiled in eight "tankōbon" volumes, released from November 11, 2007 to April 17, 2009. The second arc, "Tobaku Haōden Zero: Gyanki-Hen" (賭博覇王伝 零 ギャン鬼編), started on July 13, 2011 and finished publishing on May 29, 2013, with ten "tankōbon" volumes published from October 17, 2011 to July 17, 2013.