?) is a 2004 Japanese animated film, produced by Sunrise, and directed and co-written by Katsuhiro Otomo, his second major anime release, following Akira
. The film was released in Japan on July 17, 2004. With an initial production cost of $26,000,000, Steamboy
is the most expensive full length Japanese animated movie made to date. Additionally, the film was in production for ten years and utilized more than 180,000 drawings and 440 CG cuts.