The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
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In Japan, watermelons are grown into the shape of a square so they are easier to stack and transport.
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Macaques monkeys in Japan learned to steal purses and wallets, take out the coins, and use them to buy drinks and snacks from vending machines.
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In 2012, as phone booths become increasingly obsolete because of mobile phones, a Japanese artist has turned several booths in Osaka into aquariums.
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