Sword Identification

I am respectfully looking for assistance. I have spent many hours attempting to decipher the markings on this katana but have only identified a few. Any assistance would be appreciated and welcome.

Thank you.

sword_characters.pdf31.51 KB
2020-01-05_16.31.03.jpg159.25 KB
2020-01-05_16.31.22.jpg157.52 KB
2020-01-05_16.44.56.jpg120.02 KB
2020-01-05_17.19.28.jpg129.67 KB
2020-01-05_17.19.47.jpg197.73 KB
6645.jpg61.97 KB
6652.jpg142.03 KB
6654.jpg178.74 KB
6655.jpg181.51 KB
6658.jpg300.56 KB