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1.
an irresistible impulse to steal only aluminum coins which are the basic unit of currency in Japan.

Kleptoyeniacs are harmless everywhere, except for Japan or if you've just returned from a foreign exchange point (with yen of course).

kleptomaniac
-noun
1.
a person who has kleptoyenia.
–adjective
2.
of, pertaining to, or characteristic of kleptoyenia or a kleptoyeniac.
The yen nicking over there is clearly a case of kleptoyenia since what he nabbed isn't worth a thing here in Barbados
by pandaninja April 21, 2011