Exact Change Coin Collecting Software
Order now

Download the demo


ANA member


History is often reflected in coins and currency.  From the fractional currency of the American Civil War to modern commemorative coinage, each reflects the fortunes and values of the issuing country.  An excellent example is Japan's 1 Sen coin which changed several times as the tide of war turned against the Japanese Empire.

At the outbreak of WWII Japan was issuing the same 1 Sen coin that had been in use since 1916.  Made of bronze and measuring 23mm, it weighed 3.7 grams.

Emperor Hirohito
4-19-1901 to 1-7-1989

In 1938 a new design was adopted and, after a short run, the metallic content was changed to aluminum and the size reduced to 17mm resulting in a weight of 0.9 grams.
In 1941 the design was again changed.  The diameter was reduced to 17mm and the weight reduced to 0.65 grams.  In 1943 the coin was made thinner to further reduce it's weight to 0.55 grams.
In 1944 the new design for the 1 Sen coin was produced with an alloy of tin and zinc and a weight of 1.3 grams.  Its size was reduced to 15mm.  Tin-zinc is an alloy common in WWII coinage, and one that corroded quickly in the Japanese climate.
In the final days of WWII a 1 Sen coin made of baked clay circulated unofficially in Japan.

Click here to view the previous Pick Of The Week

News & Info  General features  Screen shots  Comparisons  U.S. coinage  World coins  Wallpaper Press  Date conversions
Software manual  FAQs  Downloads  Submit images  Contacting support
System requirements  Show schedule  Purchase now  
Register  Market index  Pick of the week  Web rings  Web links
          2018 Wild Man Software, Inc . 

Site Map