Yeah, I've seen a fair amount of "but what will we eat?!" Netsuke-clutching and like... Y'all already have a trend towards bread for breakfast and you love your wafu pasta. Do that a couple of times a week.
But it's Japan, so I imagine there's plenty of Showa who think all change is to be valiently fought and that not eating rice prevents you from being "proper" Japanese.
Why is it so objectionable that people are upset a common food item is increasing in price?
Food isn't a commodity. I won't happily substitute nutriloaf for my lunch today.