Kamurai
Good watch, would watch again, and can recommend.
This was a hit movie at the time, and other than the Xenos design, I'd say it is still a pretty good movie. The "anti-Jaws" approach of showing the monster off is really cool as the premise is largely how detailed and dangerous the xenos is, but the approach removes a lot of the suspense in the hunting and subterfuge, almost humanizing her as "hunted by the evil government entity".
While it would be a much different, and arguably better, movie to do something more like "The Thing", that she only has one human mask sorts of outs her, making it more like a spy movie, and I think they did really well with that in mind.
It just lacks the level of nuance and hidden information that spy ...