Japan marks Electric Vehicle Day May 20

Japanese social media accounts and local auto shops marked May 20 as “Electric Vehicle Day,” reviving attention to a company-backed commemorative date tied to one of Japan’s earliest electric cars. Posts on Wednesday paired reminders about electric-vehicle inspections with references to a 1917 imported electric car known as the “Detroit-go,” or Detroit car, that later became a symbol for battery maker GS Yuasa. The observance is not a public holiday, but a registered commemorative day promoted through automotive and local-interest channels. A post from Kobac Tottori, a local vehicle-inspection shop, used the date to encourage EV owners to get their cars checked. ### Why is May 20 being called Electric Vehicle Day? May 20 is recognized in Japan as “Electric Vehicle Day,” a commemorative date established by GS Yuasa and recognized by the Japan Anniversary Association, according to JAF Mate and anniversary listings. The date does not mark the first day an EV entered Japan. It marks May 20, 2009, when GS Yuasa’s restored Detroit electric car completed its return run after decades off the road. JAF Mate, citing the Japan Anniversary Association, says GS Yuasa created the observance to pass on the appeal of electric vehicles to later generations. Anniversary databases and dictionary entries carry the same explanation, describing the date as tied to the 2009 restoration milestone rather than a government declaration. ### What is the 1917 vehicle behind the observance? GS Yuasa says its founder Genzo Shimadzu imported two Detroit electric cars from the United States in 1917, during an early electric-vehicle boom in Japan. The company says the cars were fitted with its own storage batteries and used as company vehicles. GS Yuasa’s Detroit restoration project page says the surviving vehicle ran for about 30 years before being retired and later preserved in storage. The company later displayed it in the lobby of its Kyoto headquarters, where it became both a historical exhibit and a corporate symbol tied to its battery business. ### Was this really Japan’s first domestic EV run? The historical references circulating on Wednesday were imprecise. Available source material from GS Yuasa and JAF Mate describes the Detroit-go as an imported U.S. electric car brought to Japan in 1917, not as a domestically manufactured Japanese EV. GS Yuasa’s account places the vehicle inside a broader history of electric cars in Japan, saying electric vehicles had already been imported into the country by 1899. That means the May 20 observance is better understood as a company-created anniversary linked to the restoration of a historically significant early EV in Japan, not a marker of the first domestically built electric car. ### Why were repair shops talking about inspections? Kobac Tottori, in a May 20 X post, used Electric Vehicle Day to promote EV inspections and maintenance. That fit a broader pattern in Japan, where commemorative dates are often used by local businesses and trade-facing accounts for seasonal marketing and consumer reminders. The pitch also reflects a practical issue for EV owners. While electric vehicles have fewer moving parts than gasoline cars, they still require routine checks on tires, brakes, suspension, lighting and high-voltage-related systems handled by trained technicians. The May 20 messaging turned a historical anniversary into a service prompt. ### Where does the Detroit-go fit in Japan’s EV story now? GS Yuasa presents the Detroit-go as an “original eco-car” and as a symbol linking its early battery business to modern EV battery development. The company’s restoration project says work began in 2008 and aimed to preserve the vehicle’s period character rather than convert it into a modern roadgoing EV. The vehicle remains on display at GS Yuasa’s Kyoto headquarters, according to the company and JAF Mate. That gives May 20 a fixed reference point: a 1917 imported electric car, a 2009 restoration run, and an annual commemorative date that local shops and automotive accounts continue to surface each year.