This is actually probably my favorite Kurosawa movie. Perfect little screwball action comedy that's very funny and doesn't last so long that it gets kind of tiring. Plus, the fountain of blood. The editing in this clip robs all of this of context, though.
Look around for Mifune's fight in Sword of Doom for more goodness. (The "Samurai Berserker" clip linked at the bottom of this when it ends is the ending of Sword of Doom and is totally awesome.)