I would like to do a US version Remake

Ya no dude....wouldn't work, it may in your head but that is where it lives...and dies, sorry :) but it is way too Japanese lool

Don't bother, US remakes never work. To appeal to US audiences, the giri/ninjo conflict, an essential part of the film, would have to be removed, and thus make the message pointless. As for themes shared by both cultures, this may be so in some cases, but are approached in totally different ways. The suicide would have to remain, the title of the film is Hara-Kiri after all. You could make a US version, but as with most American remakes, the result would be an homegenised version of the original. Leave well alone.

Honestly I had a similar thought. But yeah-homogenization would be rampant. You could hyper-homogenize it by making the story Neo-stylized modern-day, gun kata in place of swords, do a version of the Afghan War, veterans et al. But now we're basically telling another story
...but you can't tell me you wouldn't watch something like that. I would. Nowhere near enough gun fu in the world.

Starring Keanu Reaves as the father... lol this movie couldn't be remade in the US it's all about the idea of samurai honor with something that was only practiced in Japan being a major point in the film, there is no American equivilent to seppuku bluffs or seppuku itself