Help Needed: Reading Dates On Japanese Coins

I can't pull up your link but here is a website I use: http://dateconverter.net/

Dating Modern Japanese Coins

Dating Japanese coins of the Yen system, issued since the Meiji restoration, is very straightforward as long as you know two things.

Firstly, you have to know ten numerals, one other character which is used like a numeral, and the character for "year".



Then, because Japanese coins use era dating, you have to know four two-character words, each of which stands for a period of time.



The date is always stated by giving the era name first, then the date, then the character for "year". Coins of "Meiji" & "Taisho" always read right-to-left, so when you see the first character of either of those words, you should then read leftwards, seeing the second character, then the numerals, then the "year" character. (Don't be confused by the fact that the first character of "Taisho" is also the first character of "Dai-Nihon", the name of the country.) Coins of "Heisei" read left-to-right. Coins of "Showa" dated before year 23 read right-to-left, those dated year 23 or after read left-to-right. Japanese dating is in a semi-place-value system, so twenty-three, for example, is expressed as "2"-"10"-"3", with three numerals.

So, once you've determined the era and era date, what then?
Very simply, the first year of Meiji is AD 1868, so you add 1867 to the era date to get the AD date.
For Taisho, add 1911.
For Showa, add 1925.
For Heisei, add 1988.
For coins dated with the "first" character, just add 1.

Examples


"Meiji 28 Year", right to left
1867 + 28 = 1895


"Showa 3 Year", right to left
1925 + 3 = 1928


"Showa 33 Year", left to right
1925 + 33 = 1958


You can probably figure this one out for yourself.