pigments are the least problem, and many are not dependent on oil, like titania. some might, like soot, but because we're talking about japan, it's likely they get it from chinese manufacturer, and chinese chemical industry relies on coal heavily. but it's such a small part of it all, binder, solvent and the entire packaging are likely petroleum-derived or dependent so there's close to zero savings here. not to mention fuel and fertilizer use in farming that led to that product

it's such unbelievably petty corner cutting, the only value of it is in marketing

you know what would help them? switch to solar process heat, best time for it was decade ago, second best time is now (they're using heavy fuel oil for heating something)