I watched this out of curiosity but once I began it I couldn't stop but follow the rest of the film instalments. Indeed the story line was superb. All the actors seemed to have fitted in well with their parts. Especially with the main star Takeru Satoh and Kasumi Arimura. A lot of good points to mention but what truly peaked my interest was the storyline and the fight scene choreography. All I can say is WOW!
But the ending kind of bugged me out a little bit since it could have been happier perhaps, but nonetheless it was necessary for the other film instalments.
This is actually a good watch, once you start it you'll get hooked with the rest of the parts! Enjoy