I did not see this movie with overly high expectations.
My demands for a movie are fairly rigid. Whatever happens must be within the bounds of the world that is portrayed. As long as this consistency is maintained I am willing to suspend disbelief to what occurs.
It is well made, well written, the acting is good (but why do these movies ALWAYS need a comic relief character?).
I was actually impressed with how well the story was told, how the contrivances of the story were incorporated and made perfect sense within the the boundaries of the story. The characters and dialogue were believable for the story.
Zeiram is not the first but the second movie in this story.
The first is the anime Iria. Iria: Zeiram the Animation - Complete Series (Limited Edition Collector's Tin)
There is also a second live action film - Zeiram II The Zeiram Duology (Zeiram 1&2 Double Feature).