Ninja Assassin

The weapon Raizo favours throughout the movie is the kusarigama, a notoriously difficult weapon to master.

In the hotel, Mika tells Raizo that she doesn't smoke. Later in the movie when Raizo is recovering on the bed, Mika is seen smoking. However, this due to her doing what Raizo had earlier done for her, masking her scent with smoke from a cigarette.

The Warner Bros, Legendary Pictures, Dark Castle and Silver Pictures logos appear from and disappear into darkness, similar to a ninja's shadow-blending ability. They are also completely metallic, with a few streaks of blood.

In Singapore, there are two versions that has been released; one is an R21 rated version and M18 rated version. For the R21 rated version, before the film R21 rated version could be approved for theatrical release, the company required to remove a religiously profane which is not allowed for film classifications according to BFC to approve officially for theatrical release. For the M18 rated version, the film has been edited to M18 classification after moments of strong violence has been edited.

Featured in Trailer Failure: Jennifer's Body, Inception, Ninja Assassin, Power & Astro Boy (2009)