Looking for some help on identifying this family crest on a possible WWII Japanese sword

[JohnnieGray]

Hello, recently acquired a sword with what we believe to be a Japanese family crest/symbol.

 

Added another picture from another sword, thanks for any insight you may have. 

 

Any help would be appropriated.

Edited April 26, 2023 by JohnnieGray
Added a second image.

[SteveM]

The first one looks like kuzushi tachibana (simplified citrus fruit flower)

https://kamon-db.net/portfolio/tachibanakuzushi

 

Second one is a family name 深見 (Fukami). 

[JohnnieGray]

Thank you for your response.