The Gate Tower Building skyscraper in Japan has a highway passing through its fifth, sixth and seventh floors.
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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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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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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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Japanese engineers were asked to redesign the front end of the Bullet Train because it carried enough speed to create a sonic boom whenever it exited a tunnel. Residents could feel the blast from miles away.
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