Emily VanCamp revealed in an interview that, due to time constraints and her lack of familiarity with the language, during her scenes with Hiroyuki Sanada (Satoshi Takeda), he would tape signs with her Japanese lines to his chest.
Emily was only given a day to learn martial arts and her Japanese dialogue.
Last time the title sequence is shown as a plain black background with white lettering. From following episode, it is the much more dramatic stormy ocean and glowing moon.