I didn't think it was too long, I liked it a lot. I agree about the end scene with the Meiji Emporer being a bit too Hollywood-esque, but I thought the final battle scene with the gattling guns and all the troops bowing in respect to Katsumoto was great.
Unfortunately you won't see any beautiful Japanese landscapes in film because, and it pains me to say it, there aren't any beautiful Japanese landscapes left. They've all been covered in concrete and high tension power lines, so they had to film most of the movie in New Zealand. Very beautiful New Zealand landscapes are in the movie though!