The Japanese Yen (pronounced "en" in Japanese) is the official currency of Japan. In use since 1871, the currency is the third most traded currency in the world. The currency's coins include denominations of ¥1, ¥5, ¥10, ¥50, ¥100 and ¥500 and banknotes are available in ¥1000, ¥2000, ¥5000 and ¥10000. One Yen is equal to 100 Sen and 1000 Rin. To protect users from counterfeit banknotes, Japanese authorities take great care to ensure all banknotes are kept clean and undamaged by examining all notes that are returned to the bank and replacing and destroying any that are not of a particular standard. The ¥5 and ¥50 coins feature a hole in the center.
Introduced in 2009, Bitcoin is an online, digital currency which doesn’t have a central bank or ownership and is often referred to as a peer-to-peer payment system. Bitcoins are generated through a process known as "mining." This involves using specific software to solve maths problems. When a maths problem is solved, the "miner" is rewarded with a Bitcoin. These Bitcoins can then be exchanged for goods and services. Although the number of companies who accept Bitcoins is currently limited, as the currency becomes more well known the number is growing. Bitcoins can also be bought using other currencies. Bitcoin is also a "crypto-currency" which means it uses cryptography to drive the production of Bitcoins and Bitcoin transactions. This makes the currency extremely secure. The "block chain," which is effectively a public book of accounts, is used to check that genuine Bitcoins are being exchanged in all transactions. Bitcoin benefits from no limits of exchange as users can perform instant transactions at an