I don't normally read plays, but when I first read King Lear, I was thrilled by the power of it, although it was translated in Persian.
When I heard that this movie is based on King Lear AND a Japanese story, I thought it might be a weird lame movie (because movies based in books are seldom as good), and I watched it with an ex of mine, reluctantly. I was dead wrong. I was more thrilled and dazzled by the movie than by the book.