The Leaf and Outlander PHEV were the biggest sellers with CHAdeMO here. The power stations that would charge a CHAdeMO car at home, and allow the car to supply power back during an outage came out not long after CHAdeMO was released. Instead installing the equipment to allow the car to power a house in the car, these stations have it in the home charger. The Mirai has the outlet so it can be used with such a station for emergency power. Toyota had planned to have it as an option for the Mirai here, but I believe costs prevented it. At the time, one of those power stations cost around $8000. No idea how popular they even are in Japan. On related note, some one did install a setup to allow their gen2 Prius work as a dedicated home generator when it's parked at home. The Correct Answer