It seems that Japan is getting greener almost by the week. Now Japan Post announced it will start a field test with electric vehicles (EVs) for postal services and other business activities as early as next month. The company plans to convert all of its fleet of more than 20,000 cars to electric vehicles by 2016.

Mitsubishi’s mini car “i MiEV” (pictured above) will be used in the Japan Post office in Ginza in central Tokyo for about 2 months from Wednesday, December 3. The i MiEV is planned to be used mainly for client visits.

The company said it plans to use Fuji Heavy Industries‘ “Subaru Plug-in Stella Concept” (pictured above) for its collection and delivery services in the Yokohama Port office for about a year from Tuesday, December 2.

Last fiscal year, Japan Post used around 70,000 liters of gasoline, costing over $105 million.