This is an action toy, with some die-cast metal parts, of a science fiction/anime character or item.
This is the Kawai Shokai Version, as pictured below. Unlike the Normal version pictured on the box above, the Kawai Shokai Version has tiny metallic flakes in its blue-black dark areas, with the lighter areas silver-gray, and blue lower arms, legs, hands and feet. And unlike both the Normal and Limited Color versions, the Kawai Shokai Version comes with a "secret item": an open black hand (to provide Mazinkaiser still more hand-shaking fun, apparently).
Be sure to see the Normal color and Limited Color metallic Mazinkaiser versions, too!