Normally, you wouldn't expect to see a band of fully costumed ninja assassins enjoying a meal of light snacks and warm sake in the back room of the cocktail lounge at the upscale Hotel Lucia. But ...

In “Ninja Assassin,” which is numbingly gory when it isn’t just plain numbing, the assassin Raizo, played by Korean pop star and budding actor Rain, rains down on his interchangeable adversaries like ...