Hi,
I was looking at an exquisite tachi in koshirae dating back to the nanbochuko period. The comment made by the seller is that the sword was shortened in the Edo era due to regulations. I was not aware that there were edicts passed that required the tachi to be shortened. If so, is that correct at all?
Also, what would be considered to be a correct tachi length. I know that for the uchigatana the length was in relation to body length and arms lengt, but how was that determined for a tachi?