They did an outstanding job on the sets... You'd never know it was all filmed in BC. The CGI doesn't look off at all. Have you read the book (or any of the rest of Clavell)? My fave of all he wrote was King Rat.
Discussion
I read Shogun many years ago. It's nice to be revisiting. I don't think I read any further than that. Probably won't at this point.