A slang term used by non-Japanese nationals in Japan, referring to a 1 yen coin, which holds the approximate equivalent value of a penny. Often considered worthless due to Japanese merchants using increments of 5 yen at a minimum, with 10 yen increments most common.
"Hey man, got any change? I wanna get a cannedcoffee." "Nah, man. All I have is a thousand yen note and a yenny"