I purchased a nice nihonto at an estate sale several months ago, knowing absolutely nothing about them. It was a very hot item and that's why I decided to purchase it. To make a long story short, I embarked on trying to determine what I had and have concluded that this sword is authentic in my opinion (e.g. rust pattern, hamon, utsuri, etc.). I also tried to determine the signature (an obviously very hard task for this novice), but I had fun trying to figure it out, it was like doing a puzzle or riddle. Well, low and behold I ran across the Kanesane sword description on Japanese Sword Index site and I believe that the signature on my nihonto matches the Kansane signature in D (there is no stamps on the sword). I attached a photo of the mei. What do you think? Thanks a bunch!
https://www.japaneseswordindex.com/kanezane.htm