Indian Jambiya

[David]

Stabbing blades like the keris and the tombak you posted earlier don't need extreme edge sharpness to be effect as weapons. A Japanese sword you refer to is most likely a katana and it's effectiveness comes with slicing actions rather than stabbing so edge sharpness is paramount to these kinds of blades. I don't really know enough about the use of the jambiya, but i assume it is a stabbing blade.