Quite possibly uses Toyota technology
If you can watch it, the latest episode of Samurai Wheels on NHK World (not available on their own streaming site, but possibly around on YouTube) they cover the Toyota Mirai - the first commercial produced hydrogen powered car. In it they explain how it works, take it for a drive (they find the Mirai heavy, but handles well and has a decent turn of pace, including being able to overtake safely), cover costs - cost per mile works out similar in Japan to petrol (think it was about $90 gave them ~800 KM range).
Also they interviewed the head of the Toyota department behind it - he explained they have created some thing like 5000 patents for the technology, all of which they have made free for others to use to try and help push the technology.
Of course the Mirai is expensive and looks odd/large, but from they way the tanks are positioned I suspect much of that is cosmetic to produce a futurist looking car.
Oh and they talked about crash tests on the hydrogen tanks. Apparently they even shot one up and it still failed to explode.