NHK ni Youkoso! is the manga adaptation of Tatsuhiko Takimoto's novel of the same title published on January 28, 2002. The manga series was published in English as Welcome to the N.H.K. by Tokyopop from October 10, 2006 to September 16, 2008. VIZ Media republished the series digitally under the VIZ Select imprint from June 16 to December 9, 2015. It was also published in Brazilian Portuguese by Panini Comics from November 2010 to February 2012.