Funny enough, I was trying to google more information about my blade that I just purchased off of ebay, and it is this exact sword. I had to double check the NBTHK number on the paper. It is actually sitting on the wall right in front of my. I love it. It does appear to have a couple of blisters in the steel. I've also been researching the dates of popularity of the nagamaki, and get some conflicting sources - most say they were at their height of popularity in the mid-Muromachi period. But, I had really been wondering what the attribution said and what it meant. I appreciate the translation. Google translate came up with Kuchimaki bridge as it's first translation.