Japan has little traditional fossil fuels, but they were making a lot of noise about exploiting the methane hydrate in their seas:

> Methane hydrate is confirmed to exist abundantly in the sea near Japan and is expected to become one of the domestic energy resources of the future

https://www.japex.co.jp/en/technology/research/mh/

So in this case, they're really just a subset of the "oil and gass industry" boosting hydrogen vehicles.