It broke the threshold in New York on Thursday.
The yen has fallen nearly 25 percent against the U.S. dollar since November, when Japan's cabinet approved a 422.6 billion yen economic stimulus package of subsidies and tax grants designed to boost its economy.
The measures have helped boost exporters' profits and triggered a rally in the country's stock market.
Tokyo stocks closed at their highest level in more than five years on Friday following the dollar's jump past the 100 yen mark.
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