Can lunch boxes in Japanese supermarkets be eaten after one day's expiration?

I'm familiar with this in Japan, but I can actually eat it, because it's a taste appreciation period, not an inedible period, but I can't guarantee the original taste, which means I can eat it, but it may go bad, but I can't eat it after the edible period. It shouldn't be a big problem to put it in the refrigerator, but it's best not to eat it the next day