Wāqwāq(ワークワークWākuwāku) is a manga series written and illustrated by Ryu Fujisaki. It was serialized in Shueisha's Weekly Shōnen Jump between 2004 and 2005. Shueisha later compiled the chapters into four tankōbon in Japan, the first released on January 5, 2005, and the fourth on July 4, 2005.[citation needed] The manga is licensed by Viz Media for distribution in North America, the first volume released on August 4, 2009, and the last on May 4, 2010.