Direwolf750 said:
Firstly, the katana is a much more efficient killing weapon than a European broadsword, or any large straight edged blade, because of its curve, the two kinds of steel used to make it, and it is as a general rule, also a work of art. The curve allows a better cutting motion, allowing you to cut all the way through without it getting stuck (ideally). The two kinds of steel are too complicated to describe here, look for yourself, and each blade is a work of art (assuming its a REAL katana).
Each one was crafted individually for the samurai and were both valuable and a mark of status. The blade was part of who you and your family were, not because of resources, but the blade was your family's sword, and heirloom, and not something replaceable. The treatment to make the katana shatters or warps many blades, so making one was a very in-depth and time consuming.
Finally, spears were used by so many cultures because they were useful against cavalry, and were cheap to mass produce for all the canon fodder they were sending out. Unless you are talking about another pole-arm weapon, the plain spear was not exactly a great military feat.
Well, that was kind of what I was implying. A real katana is more of a work of art - and it WILL cost you a lot. An imitation won't, but an imitation isn't much of a katana... a katana was always as much a status symbol as it was a weapon, perhaps more so the former then the latter.
In regards to my spear comment, I still stand by it. I'm not much of a medieval weapon geek, so some specific names might escape me, but when I was talking about a spear I meant more of a generic short/medium length spear and a shield combination that has been used by various cultures including the Greeks. Sure, any kind of big military maneuvers relying on massive formations with shields and spears are very different from anything one can attempt alone...
But in a hypothetical situation where I had to pick a medieval weapon with my current, uh, lack of expertise, I'd go for a spear. Swords are a lot more complicated then some people might believe from the movies and books. A spear is easier - once you know how to do a good thrust, you're probably okay. And a thrust isn't too hard, I at least know how to do some basic thrusting attacks from when I tried using a staff.
A basic spear can be easily made out of a branch or a tree, with no blacksmithing involved. Sure, it won't be exactly a masterpiece, but it would still be sufficiently sharp to pierce someone if you thrust hard enough. And in my limited experience with fighting, most people sooner or later end up more or less attacking your head on - and in that situation, a quick thrusting attack around the stomach might be harder to defend against compared to a swing at the upper torso. You can't really block a thrust directly, you'd need to either sidestep or try to redirect it - which is hard if you put most of your body into the thrust.
Spears can be easily made, do not require too much training to be more or less effective, and they generally have greater reach then some other melee weapons. Hence my choice, and the comment about spear being often used through the history of mankind.