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, gambling is illegal. However, they circumvent the law by giving out prizes instead of cash, which the winner can then sell back to the establishment for cash.
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Japan is the largest exporter of frog's legs.
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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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