Greyjeth 说:
And with that statement your credibility just sunk a lot. If you could also explain how it would be "catering" that would be great. Last I checked trade between Europe and Japan did happen around that time period, so who's to say a Katana couldn't have been in that area of the world (at least at that time period).
Also of note is that trade between Europe and China was significant, yet there are no repeating crossbows in the game. You'd think that if the Europeans were going to buy anything, they'd first buy something with clear advantages over their current equipment (repeating crossbows had much higher rates of fire than muskets). I don't actually want these added, this is more of a "Japan had generally crap weapons which weren't innovative or useful, while other countries had good weapons which aren't included" statement.
Why would the developers add katanas to the game simply because they MIGHT have been traded to the Europeans? Honestly, any game which includes a katana when it's set in 17th century Europe is clearly pandering to weaboos. I've seen absolutely no historical accounts that mention Europeans buying katanas, let alone buying usable (non-wallhanger) katanas and actually using them in battle!
The cold hard truth is that the katana was a sub-par weapon. It was made of poor quality iron (hence why it needed to be folded so damned much just to get it to have semi-decent strength and hardness properties) and was useless against armor - it would chip due to the hardness of the edge if it hit armor with much force and it had no point to thrust with in the hopes of piercing armour. It is a severely over-rated peasant-killer. Its construction methods were traditional, rather than high-tech. Its design facilitated in cutting down unarmored opponents while on horseback (much like a saber) and the curve serves no real use aside from that (the curve helps stop the blade getting stuck behind or in the person the rider is swinging at). The various European swords were almost all forged with superior materials and techniques, were hence more durable, were just as capable of cutting up unarmored opponents and also generally had a point to try to pierce through armour. Deadliest Warrior shows people using a dull-edged longsword against a sharpened katana. The katana wins. Sharpening is not a difficult nor time consuming skill. Sharpen the bloody longsword and it will cut just as well as a katana, but will be less likely to chip. Deadliest Warrior is a horrible, horrible show with so many details (like the simple sharpening of a blade) completely ignored and not understood.
In short (er...long) that's my thoughts on why no European would likely bother to buy an expensive katana for the purpose of using it in battle - they have much better weapons of their own already. Sure, some might have bought some as wall hangers, but who's going to use an expensive, inferior wall hanger in battle?