The Irohazaka slope winds through the fall foliage in this Nov. 1, 2020, file photo taken from a Mainichi Shimbun helicopter in Nikko, Tochigi Prefecture. (Mainichi/Kentaro Ikushima)© The Mainichi ...

But hydrogen vehicles remain exotic here in Japan, seven years after the Mirai launched. There are only about 4,000 hydrogen cars on the road in the country today, which is just 10% of government ...