Look on the upper right.on the 5 Sen side . In Japanese it says 3x10 and 2.This is the 32nd year of the reign of Matsushito which was 1899. There were only 4 years of this style of coin.This year was the last rare but they are all pretty hard to find. It's pretty common for coins to be dated by the regnal year but kind of hard sometimes to figure out how to read it.