A Nissan Sakura electric vehicle (left) and a Mitsubishi eK X EV at the Mitsubishi Motors Mizushima plant in Kurashiki, Okayama Prefecture, Japan. Bloomberg
Kei is short for keijidosha, meaning light automobile. Bloomberg
Light automobiles account for a third of all sales in Japan. Bloomberg
Nissan and Mitsubishi released electric kei models to the market on May 20. Bloomberg
The interior of a Mitsubishi eK X EV. Bloomberg
A Mitsubishi eK X electric vehicle. Bloomberg
A worker assembles a battery pack for a kei electric vehicle on the production line at the Mitsubishi Mizushima plant in Kurashiki, Okayama Prefecture. Bloomberg
A worker installs a stack of lithium-ion batteries onto a battery pack for a kei electric vehicle. Bloomberg
A Mitsubishi eK X in the inspection area at the company's Mizushima plant. Bloomberg
Nissan Sakura electric vehicles. Bloomberg
Nissan and Mitsubishi unveil electric vehicles - in pictures
