Rinko Kikuchi attended Comic Con 2012 to promote Guillermo’s Pacific Rim. Towards the end of an interview with Fred Topel, she answered questions about 47 Ronin. When asked about her role in 47 Ronin, she said that she played a witch and was Keanu’s character’s (Kai) enemy. Some of the other tidbits she mentioned included that Keanu was an expert on the set when it came to the martial arts scenes and he practiced a lot, she did wire work on the film for the first time, and Carl Rinsch was a visual director.
The entire interview can be read at Crave on Line.