First let me clarify that I would NEVER use an antique nihinto for chopping things up!
Second while I appreciate the concern, I am ex military, took various martial arts, grew up in the SCA, and have been collecting various blades for 20 years. Right now my collection is mostly busse, swamp rat, and bark river. High end outdoor knives mostly, no true swords to speak of.
I am not saying I am some expert warrior but I am capable and careful enough with blades to know precisely how dangerous they can be. I do however thank you for the cautionary words! But please don't think I'm going to take a 500 year old blade out back and whack trees with it, I did not mean to give that impression.
I'm in Richmond Virginia.