If you have seen it, note how Wolverine feels the need to protect people he has just met, in a culture and country he does not understand, simply because it is the right thing to do.
This impulse is largely Western. Specifically, it is Anglo-American. It is based in abstract notions of right and wrong, and in absolute principles. It is chivalry, the code of the Horse. This is quite different from the absolute loyalty to a specific man implied by the Way of the Bushi. Both imply courage and honor, but deployed, potentially, in very, very different ways.
Some ideas are better than others, when measured against a global goal, which I argue often should be Goodness.
I believe I have mentioned this, but during the Vietnam War era, among the Vietnamese, it was apparently a commonplace that all you had to do was get an American drunk, and they would do anything for you. They would give you the shirt off their back. I personally experienced this: a Vietnamese man I was taking a Chinese class with got me drunk, then asked me to help him get his girlfriend back. I did it. The stereotype in my case was true.
I will contrast this with an example given by a martial arts teacher with many years experience dealing with Japaneses. He said the Japanese will give you the shirt off their back, but they will resent you for it.
The female protagonist, throughout, wrestles with duty and honor. It is noted clearly in the chopsticks scene that she understand herself to live in a world filled with humble obeisance to tradition and those who enforce it (men).
In the end, though, she “betrays” her grandfather. Her father wanted to kill her, and her grandfather is trying to kill Logan. She chooses Goodness, the right thing, over tradition.
In the course of human history, allegiance to principle over tribe is a very new innovation. It is, in my view, an innovation which has most taken root in the United States, in our traditional, actually Liberal, culture.