Karakuri Dôji Ultimo (機巧童子ULTIMO?, literally, “Mechanical Boy: Ultimo”) referred to as Ultimo is a Japanese manga series created by Hiroyuki Takei and Stan Lee (and his production company Pow Entertainment). The plot of the story depicts a conflict between good and evil, implicated through the Karakuri Dôji created by the character Dr. Dunstan.
The pilot chapter “Karakuri Dôji Ultimo Chapter: 0” (機巧童子 ウルティモ: ゼロ, “Karakuri Dōji ULTIMO: Zero”?) was originally published in a special issue of Jump Square, called Jump SQ. II (Second), on April 18, 2008. The series Ultimo was first serialized in Jump Square in March 2009, and it continues monthly serialization. Shueisha also publishes Ultimo in tankōbon format—the first published on July 3, 2009, and the fifth on November 4, 2010.“I am deeply honored for this great opportunity to collaborate with an award-winning artist/writer of the stature of Hiroyuki Takei. I enthusiastically expect that the combination of an American story-telling style merged with Takei-san’s acclaimed Japanese style will result in our joint creation Ultimo presenting an original, exciting type of manga that will appeal to comic book fans around the world.”
- —Stan Lee, quoted from press release.