Grandpa Danger
is an adventure manga by Kazutoshi Soyama. It was published by Shogakukan in CoroCoro Comic since October 2001. It received the 2005 Shogakukan Manga Award for children's manga. There is a 51-episode anime series based on this manga. It was broadcast on TV Tokyo from April 2004 to March 2005. It is licensed by Viz Media in North America as Grandpa Danger. There is also a series of video games based on this manga. A second anime television series ran from October 20, 2012 to December 22, 2012.