Bottom right: 1736-1795 Chinese Cash Coin, Of emperor Ch'ien Lung. The back is too worn to read the mint.
Bottom left: 1796-1820 Chinese Cash Coin, Of emperor Jen Tsung. It was minted at the Chi-chou mint in Chihli.
Top: Machine Struck Chinese Cash of Emperor Te Sung, who reigned between 1875-1908, machine struck cache coins minted under his reign were struck between 1889 and 1908. It was struck at the Kwangtung mint, this mint struck these coins between 1890 and 1908. I hope I helped with those three coins, I love the history behind cash coins and think that they are very interesting coins to collect. I have some from various dynasties, some are around 2000 years ago. Those coins have not changed much though out the centuries. All of yours were struck during the Q'ing Dynasty, a very fun set to try to complete. Here's a website very useful for identifying Cash coins, this website helped me with identifying the first Cash coins I ever bought. I still use it sometimes as a reference for some coins in dynasties through out China's history. http://www.calgarycoin.com/reference/china/china8.htm#images http://www.calgarycoin.com/reference/china/chinaid3.htm
As for the Japanese 5 yen coin, the coin on the left is dated 1960 and the right is dated 1952. The one on the right is actually slightly less common as it is an older script (Kaisho script vs gothic script).
