I haven't finished it yet but I have read the book. Didn't they basically cover all the content from the book in season 1? I can't imagine additional seasons would be nearly as good with show runners just making things up off the cuff.
This is my worry as well. I didn’t read the book but as far as I know season 1 already covered it. If they base successive seasons on actual historical events that the book was based on, maybe it can work?
The first season was phenomenal and an example of the best story telling tv can offer. I have no interest though in watching additional season that goes beyond the book. It will inevitably dissapoint and be a waste of time.
Season 1 was, like everything else, filmed in Vancouver.
I think it's only pretty recently that Japan has opened up the possibilities for filming there, to make shows like Tokyo Vice possible. Ridley Scott had a nightmare filming Black Rain there a couple of decades ago - partly because as far a they're concerned, a filmmaker's need to close down a street is outweighed by any citizen's need to use the street.
It was actually good, it's basically a political drama set in feudal Japan.
Also it is very interesting with a translation twist, like oil and water that don't mix yet they make it work.