Is this the best live action manga adaptation? Maybe. At least the best I have seen.
Riki-Oh is so violent and so campy almost like a cartoon but doesn't feel awful. The presentation, the pacing and effects make this film a fun splatterfest with a little heart. With how over the top this film is, you would expect cohesion to be lost and it isn't.
Full of fun characters, great costuming and creative choreography, Ricki-Oh is an action film personified. Not for everyone, I can guarantee that, but if you give this one a chance you will not be disappointed.