Let's get this out of the way.
Kobayashi's hard hitting "Harakiri" is a masterpiece. It's one of the great pieces of not only Japanese cinema, but also one of the best movies of the 20th century. While I'm disappointed the film was remade at all, and surprised it came from Miike, there are still good things to be found here. To my surprise, for the most part, this is a good movie and in very small quantities, there are some true moments of greatness. Even if they are very short.
A good deal of the original film's grit is lost for most of this go around. The cinematography is over-lit and the pacing falls into lulls. But survive to the end and you will be rewarded as the final irony is quite powerful. I mean, no spoilers from me, but even with the cheesy fake snow, I have to say, Ebizô Ichikawa's powerful presence won me over and he truly wins the day when the time calls for it.
I was never too crazy about all the Kurosawa remakes of the 60s and 70s. Fistful of Dollars always felt like a cheap knock-off, because it is. The Magnificent Seven was sort of a tolerable chuckle. Kurosawa's films were so human, almost populist, because of their themes, his work was ripe for remake, reboot or even plagiarism. Only Star Wars seemed to get the joke and succeed in being something different than a pure Hidden Fortress copy. Kobayashi's Harakiri seemed to escape the trend for so long because of the subject matter - even the title! But here we are. There is still something not right about this "remake," but MIike gets it right in the end, even if never needed to be done in the first place.