For a well-written, highly original fantasy set in a Japanese-inspired culture, check out Sean Russell's "Initate Brother Duology". Here's the link to the Kindle edition:
http://www.amazon.com/Initiate-Broth...itiate+brother
Russell is one of my favorite fantasy writers and, although this isn't my favorite of his works, it is still quite good and is exactly the type of book you're asking about.