Masaki Kobayashis, Seppuku has some nice fights which aren't flashy in the Hong Kong type of way. The movie isn't a martial arts movie anyway but it is a samurai movie. I would highly recomend Seppuku as it may very well be the greatest samurai movie ever made.
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I've always thought that the final fight in Sanjuro was terrific.

I didn't watch many samurai movies, but I liked the fight in "The seven samurai"
"The sleeper must awaken!"

Trust me, just buy the DVD. If you're into kenjutsu or kendo, it's worth it. It's also a fantastic movie.

I couldn't find the end fight of the movie but thanks for the recommendation.

The Yakuza (1974 I think) is the best kenjutsu I've seen in a Western film, and better than most Japanese films. Takakura Ken takes on a group of gangsters in close-quarters with swords at the end, and it's great.