Ok, completed Red Steel the other day.
At the last battle after you beat Tokai, he says protect me from Otori and I will give you the antidote so he can live. Otori comes down, a battle ensues. He had no noticable health bar, I guess he beat me, then a cutscene where he killed Tokai, then broke the Katana Geuri and collapsed and died. Next your rescued girlfriend asks you to just leave wiith her. The End.
My question is this, are there multiple endings, and how do you get them. The game was going so good and then it just, just, somehow ended. No saving Otori or Mariko, WTF?