The plugin makes it easy to add a price in the second currency. US dollars-Japanese Yen (planning to add more currencies) are automatically converted.
When money notations appear in your posts/page text, this plugin detects and adds the converted amount in foreign currency.
For now, this plugin only works between Japanese Yen and US dollars, in English and Japanese.
For example, sentence like "It costs $350." would be "It costs $350(32,854 Japanese yen)."
The conversion is looking up the latest foreign exchange rates.
For bloggers who already did such conversion manually, the plugin has an option to set a date only after when the conversion works.