gladwort said: As of 2/14/2009, JP¥5,000 = US$50.9970. But yeah, it looks like it's only worth ¥500.
I've never really seen the point of converting yen to dollars by current exchange value since it's always bound to change and also since the Japanese view their monetary system in the same values that we do with dollars (if you think of dollars as the value in pennies).