I know Murakami doesn't write about samurai. OK, maybe its a bit off-topic.
I've got the DVD of The last samurai and also saw it in the cinema. But I think Tom should have died.
and it's too Hollywood. If you want to know something about samurai, this movie is just a start.
I recommend 'Gohatto'
Anyway, the books mentioned above are much more useful, like 'Go rin no sho', like Bueller-san said. (Book of five rings)