JPY was configured wrongly: it doesn't use subunits

src/config.js

@@ -78,6 +78,8 @@ const currencyConfig = {
   currency,
   currencyDisplay: 'symbol',
   useGrouping: true,
+  // Note: you should change fraction digits to 0,
+  //       if the currency is not using subunits (like JPY).
   minimumFractionDigits: 2,
   maximumFractionDigits: 2,
 };

src/util/currencyConfig.js

@@ -7,7 +7,7 @@ export const subUnitDivisors = {
   AUD: 100,
   CAD: 100,
   DKK: 100,
-  JPY: 100,
+  JPY: 1,
   SGD: 100,
   SEK: 100,
   CHF: 100,