Poseidon is a major cybernetics and micromachine company known for some real fringe designs. They are a real Japanese heavyweight. They have also contracted work for the JSDF, supplying weapons and technology to the Army. Poseidon, not known for their Micro machine technology, is partially credited for the most well known use of them…that of the Japanese Miracle. This achievement vaulted Poseidon into the limelight, pushed atop a hill they have yet to be knocked off of. In 2032, they would be implicated in a government conspiracy revolving around the Cabinet Intelligence Service and the Individual Eleven terrorist group.
In all, they are one of the largest corporations worldwide, with fingers in almost every facet of the modern world. They own several subsidiary corporations including Meditech. They operate a collection of gigantic marine city clusters.