June marked the first time in history that a hybrid topped the list of best-selling autos, out-selling all other vehicles across Japan. In May, the third-generation Prius beat out all other cars, which doesn't include popular mini-vehicles with engine less than 660 cc. But in June, the Prius out-sold all vehicles, even the mini-cars, according to the Japan Automobile Dealers Association.

Since the launch of the brand twelve years ago, Toyota has sold more than 1.25 million Priuses, including the 22,292 sold in Japan alone last month. The runner-up in Japan's June sales was the Honda Fit, which sold 13,016 units.