Japan's foreign currency reserves unexpectedly rose last month for the first time in over three months, an occurrence that is certain to register on the Forex trading system of anyone trading a currency pair that includes the yen.

With the increase, Japan is now holding just over $1 trillion in foreign currency.

As previously mentioned, changes in the foreign currency reserves of any nation, but especially those of major economic powers like Japan, can have a sizable impact on the foreign currency exchange markets.