The government pushes what it hopes will be the clean fuel of the future.

THE dawn of a true hydrogen society” was how Shinzo Abe, Japan’s prime minister, last month described the opening of Tokyo’s first hydrogen fuelling station. Mr Abe himself was the first to take delivery of a new fuel-cell car manufactured by Toyota, a Japanese carmaker, when it went on sale in December. It is the world’s first commercial hydrogen car, which Toyota has named “Mirai”: "the future".