Yes, I would. Such societal norms don't just die, they remain in the "ether" so to speak.
For example, americans might not be as religious, or sticking with the church. They might not even be born in the US, or just be first or second generation. But the culture, and this includes immigrants as they integrate, contains all kinds of protestant ideas.
And it's easier for something like a suicide norm to survice that a practice of the duel (which takes two to survice, plus has the law against it, even if you come out alive).
Maybe not so nowadays, but you'd be surprised how often it was a solution to societal shame in Italy up to the 1950s or so...
Considering how common a form of retribution gun violence is in the US nowadays, yes, I'd say yes.
Could there be a case to be made in comparing American school shooters and Japanese student suicides? Maybe we'd find they had similar school experiences prior to their final moments.
Does it really? Do you feel the same way about western society and, say, duels to the death? The many old practices regarding marriage and the church all around?
I don't think suicide as an honorable death is any more of a real thing in Japan nowadays than ninjas are.