Anyone have an idea about this one?

I'm not very good with these coins. I believe it's Chinese perhaps? Yes, it is my coin. No, I didn't get it in a fortune cookie.
Yes, it is rectangular and possibly made of metal.

 

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It's kind a cool looking whatever it is.

 

I think is some kind of coin but I really have no idea.

 

Does the surface have real heavy lines on it or is that the image?

 

I believe your first picture is upside down.

Google image search shows it is a coin from JAPAN



1853-65 JAPAN Silver SHU (Isshu Gin)

 

Does it mention if the coin is a cast or why it has those heavy straight lines?

 

Very nice.

 

https://en.numista.com/10811 "hammered, countermarked"