A souvenir from Asia (probably). Need help.

[okaywilhelm]

Hello there. This question is probably off topic as this is not a real blade. I found this blade in my deceased great-grandmother's possession. I suspect it is from Japan or Hong Kong, as her deceased son used to visit there often. From what I understand, it's made of walrus tusk or something like that. I'd like to ask you guys for help in telling me what it is.

Spoiler: image

 

[KenHash]

It is not from Japan. The scabard carving depicts a Chinese scene and costumes.
The meander pattern is also distinctly Chinese.
Looks like a letter opener.

 

[Monofletch]

That is really cool!

 

[Kryme]

It's a crysknife your great grandmother's son isn't deceased he has become the Muad'Dib.

Sorry dude, I have no idea what the knife is, I see a knife like that I'm instantly reminded of Dune.