Japanese Yen (JPY)

The yen or en is the currency of Japan. It is also widely used as a reserve currency after the United States dollar, the euro and the pound sterling. The ISO 4217 codes for the yen are JPY and 392. The Latinised symbol is ¥ while in Japanese it is also written with the kanji 円.
While not a usage specific to currency, large quantities of yen are often counted in multiples of 10,000 in the same way as values in the United States are often quoted or rounded off to hundreds or thousands.
The yen was introduced by the Meiji government in 1870 as a system resembling those in Europe. The yen replaced the complex monetary system of the Edo period, based The New Currency Act of 1871 stipulated the adoption of the decimal accounting system of yen, sen, and rin, with the coins being round and cast as in the West.
The yen was legally defined as 0.78 troy ounces (24.26 g) of pure silver, or 1.5 grams of pure gold. The same amount of silver is worth about 1181 modern yen while the same amount of gold is worth about 3572 yen. The Act also moved Japan onto the gold standard. (The sen and the rin were eventually taken out of circulation at the end of 1953.)