What is the difference between Japanese Yen and USD dollars?

whats the difference between yen money and u.s. money? what adds up $10= the number amount of yen? How are they different? How can you tell the difference and oppisite between prices too?|||10 dollars= 1000 yen. just add up two zeros to make it a yen|||the difference can be found here: http://www.xe.com