Yen aka ¥ aka 円

Pounds & pennies, dollars & cents, yen and, well… yen. It's all about the yen in Japan, it's actually pronounced 'en' but whatever. Yen is the only measure used in Japanese currency so your ¥10,000 would only be $83 so your far from rich! Japan is a cash country and people do pay with cards at times but for the most part people are using Osatsus and Kozenis (notes and coins) for their Gari Gari Kuns or whatever they may be interested in. You have two characters that represent the the yen, one is '¥' which is the symbol just like '$' and the other is '円' which is the Kanji character version and both are equally common in usage, however, the '¥' is used at the beginning i.e. ¥500 and the other is used at the end i.e. 500円. I kid you not, the ¥1 coin is probably the lightest coin used in the world! Money is respected highly in Japan as with many other countries, however it is one of the three main virtues that has existed  throughout history here, the three being; the sword which represents force, jewels (or in modern times, currency) which represents wealth and the mirror which represents knowledge.

Useful info.
Japanese coins: ¥1, ¥5, ¥10, ¥50, ¥100, ¥500.
Japanese notes: ¥1,000, ¥5,000, ¥10,000.

Yen

Gari Gari Kun

Sword, jewel & mirror