Goku has made guest appearances in various Japanese television shows and manga. In 2005, Goku appeared in the Toriyama parody manga "Neko Majin Z" where he is the sensei of the main character Z. On September 15, 2006, in celebration of the 30th anniversary of "Kochira Katsushika-ku Kameari Kōen-mae Hashutsujo", the special manga "Super Kochikame" was released. The chapter entitled "This is the Police Station in front of Dragon Park on Planet Namek" has Ryotsu Kankichi travel to planet Namek and try to issue Freeza a citation and scold both he and Goku for parking their ships illegally. Goku and other "Dragon Ball" characters join the cast of "One Piece" in the 2006 crossover manga "Cross Epoch". He also appears in a single panel of Toriyama's 2013 manga "Jaco the Galactic Patrolman", which is set before the events of "Dragon Ball". The collected tankōbon volume of "Jaco" features the bonus story "", depicting how and why Goku's parents sent him to Earth.