Japanese katana makers help

[Gusmc]

Hello! Just purchased this I know its authentic just trying to figure out what era it's from and if anyone can identify the original maker from the marks on the tang, thank you for your help.

[Mr. Bushido]

If I have the following information, I may be able to investigate your sword.

 

Is one letter engraved on the sword?
If it is more than two characters, please show me a picture of all the characters.
Also, I would like to know which one is the tip or grip of the sword in that photo.

[Gusmc]

Hello, the owner had stated that it was most likely an old family sword that was converted in Ww2 as to not having the sword in hand yet, Here are all the pictures of the tang that were shown. Thank you very much, and if you need better pictures when I get the sword in hand I'll take some different ones. 

[Mr. Bushido]

I tried to decipher it, but the letters weren't clear enough.

 

I think it's because I'm not a sword expert.

 

One of the letters appears to be a "魚", although it is upside down.

 

Please try posting again when you are able to take clear images of the text.

[Gusmc]

Thank you for trying! I'll get better pictures when I can.

[Gusmc]

Got the sword in hand, and took some closer better pictures hopefully this helps identify 

[Mr. Bushido]

There is a very high possibility that your sword is “【兼継】Kanetsugu”.

 

"Kanetsugu" was a sword maker who made Japanese swords for officer.

 

Therefore, it's thought that the sword was not modified, but was made in the mid-1900s.

 

It may be an imitation of future generations, but I couldn't judge.