The first one indeed has such main purpose and it is not a coin of course. Though it is worth to dig a bit, for sometimes such items, being not minted by Authorities in fact were used in payments. Usually in such payments both sides knew pretty well, that the items are not coins.
The third one has nothing to do with neither copy no with Japan obviously. It bears the name of the famous Chinese Emperor 乾隆 in the date. As it was already mentioned the style is late, iconography is from the end of the XIX century, which was spread from Japan till Vietnam. But the item can be produced up to 2019 to be sold in a monastery. It could be silver, could be not (this may be checked), for it does not copy anything or counterfeit anything: there is no country name China, there is no denomination, just the blessing.
The only what is left is the second one. It looks like a coin.
For it I'll start to dig in India, then in Iran with the first idea, that the lower symbol to the right on the second image is the numeral ٧ or ٨ for 7 or

There are a lot of copper mints in these countries with production during a millennium. It is enough coins to examine.