Keiji Yamaguchi

Keiji Yamaguchi is a creature developer at Industrial Light and Magic and was a technical animator on Transformers. Yamaguchi, who came to ILM from Japan in 2001, brought elements such as shiko, the squatting done by sumo wrestlers, and karate poses, like those of Bruce Lee, into choreographing the Transformers' complicated motions.

Yamaguchi was responsible to revising Optimus Prime's to give it a stronger, more heroic look after telling director Michael Bay that he didn't believed the design looked heroic enough. Yamaguchi was also developed the process of the Transformers transforming while in motion based upon the bosozoku, Japanese biker gangs.