Identification Help Needed For Asian Piece (Id: Japanese Charm)

I don't know what this is, but my guess it may be some sort of Japanese trinket or novelty item or tourist gift shop item.
Perhaps wrong, but that's my first impression.

It's certainly a "good luck charm" of some kind. The circular "waves" on the side with six characters are similar to thaose seen on Japanese cash coins, so I suspect it may be Japanese in origin. The characters, however, are Chinese (which as kanji can also be used to write Japanese).

In the top pic, the characters are (in Chinese) "Fu Bao", meaning "lucky coin".

In the lower pic, the six characters are "Shan ben da, shan tian cheng", which transliterates to "mountain root great, mountain field success". If I had to translate that, in the context of a lucky charm, I would render it as "as great as the roots of the mountains, so successful will be your harvest". It might also be significant that "shan ben" becomes "Yamamoto" in Japanese, while "shan tian" becomes "Yamada" - two very common Japanese surnames.

Thanks very much. He'll be very happy to receive this information.