Small bug?
 

The katana costs 7 resource while the no-dashi, a larger version of the katana, costs 6 resource. Is there a mistake? Perhaps they should be modified/swapped?

Re: Small bug?
 

It might represent the idea that a katana takes more work to make, the processes are more refined, etc.

Re: Small bug?
 

Yep

Re: Small bug?
 

Sorry, but thats wrong:
Both where made using the same techniques, and therefore the oversized "Nodachi" (or maybe no-dachi, but most surely not Nodashi) was considerably harder to make because of the oversized blade, which gave quite a lot of trouble.
http://en.wikipedia.org/wiki/Nodachi

Btw., wouldn't the Nagamaki a more fitting weapon especially for EA Jomon, and all those bandits especially, considering that the shorter blade is easier to forge, and the longer-than-the-blade hilt gives it much more reach and power against all those big-sized monsters in the Early Age? http://en.wikipedia.org/wiki/Nagamaki

And the Yari is depicted wrong, too: it should have a rather short, but straight, two-edged blade, very much like crossbreed of narrow short sword and a stabbing dagger, not the small curved one it has now. Curved (sword) blades where a characteristic of the Naginata.

Re: Small bug?
 

It seems like the Blue Dragon has the most powerful breath weapon by far. Is this intentional?