The spiked chain as superweapon is no "real life" weapon.
Secondly, Kendo = whacking someone with a shinai. It's different from wielding a blade. It's a good reference for the few blocks and stances. Striking with a blade is better referenced by Iaido. (Because doing it in Kendo would soon leave you without sparring partners.
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I wonder how they came up with the scene where they grind the edges (Gasp! Horror!) of the katanas against each other and "bind" the blades, leaning in close together. It's something that's only feasible with weapons that have true hilts, like most Western swords.
But let's get it back on topic, shall we?
Another issue I have, is the way skill ranks are capped by level. I understand the necessity for the gaming system, but it leads to some odd things: a very good craftsman in the glassblowing sector, for example, has about 10 ranks in Craft (Glassblowing). According to the rules, he would have to be an Expert (most likely) level 7. This would also imply, due to HP & BAB, that he probably can take one 3 or 4 militiamen. (Level 1 Warriors).
It can get a little awkward when your players are interacting with NPC's... I think it is because, at the core, D&D is about combat: each and every level up enhances your combat abilities. This isn't the case in some other systems.