I just started Lian Hearn's, Grass for His Pillow, the second book in the Tales of the Otori, set in a mythical medieval Japan. I loved Across the Nightingale Floor, the social constraints, the intrigue, wars, revenge, authenticity.
I lived in Japan for three years, 8th, 9th and 10th grades of middle and high school (1976-1979). Took two years of Japanese language. TV pretty much consisted of cool samurai shows on the Japanese networks and Monty Python on FEN. I've lived all over the place, but those three years were some of the most fun and interesting.
I've always wanted to write a fantasy set in the Japanese feudal period. I can think of a couple other works in this subgenre, but nothing as popular as Across the Nightingale Floor and the other Otoris.