What is a 50 yen coin?
Could you elaborate on the characteristics and significance of a 50 yen coin? Is it a commonly circulated denomination in Japan? What are its physical features, such as its size, weight, and material? Also, is it still in production or has it been phased out? And finally, how does its value compare to other denominations within the Japanese currency system? I'm curious to understand the role and history behind this particular coin.