is a 2004 Japanese animated steampunk action film produced by Sunrise, directed and co-written by Katsuhiro Otomo, his second major anime release as a director, following Akira (1988). The film was released in Japan by Toho on July 17, 2004. Steamboy was the most expensive Japanese anime film up until then with a production budget, having been in production for ten years and utilizing more than 180,000 drawings and 440 CG cuts.


In 1863, where an alternate nineteenth century Europe has made tremendous strides in steam-powered technologies, scientist Lloyd Steam and his son, Edward “Eddy” Steam, have succeeded in discovering a pure mineral water in Iceland which they believe can be harnessed as a nearly unlimited power source for steam engines. An experiment in Russian Alaska goes terribly wrong, with Eddy being engulfed in freezing gases, but results in the creation of a spherical device.