I'm pretty sure the government has a rule that keeps it under 170 JPY/litre but, yeah, that's going to stop being possible eventually.

We need a lot of diesel as well for trucking and farming (edit: and forestry and because plenty of rural trains still run on diesel). Diesel is still cheaper than regular gasoline here for the moment. If that goes off, we're in trouble.

I've already bought enough oil for my car and tractor for a while so there's that at least. I should probably fill up my spare diesel tank, but the fields have been so what I've hardly used any since I'd just sink (again).